The content in this document, with rare exception, is an aggregation of astronomical information from several websites (largely NASA, wikipedia, amsmeteorg.org, and astropixels.com). Its only purpose is to provide a lot of information in a single location – and specifically to provide it in a printable format for easy access when out observing. If you find problems or have recommendations for additional data, please contact cheatsheet@somewhereville.com or visit somewhereville.com/observational-astronomy-fact-sheet.
The original version of this document was among other educational brochures produced for Central New York Observers (www.cnyo.org). These can all be found at:
www.cnyo.org/2017/02/07/cnyo-brochure-an-observational-astronomy-cheat-sheet/
An important word on the facts: To the very best of ability, all of the information has been checked and double-checked against available data online. To that end, all of the data as presented can be directly attributed to the following websites as of their content on 1 April 2020:
* astropixels.com/messier/messiercat.html – extra thanks to Fred Espenak for use permissions
* astropixels.com/stars/brightstars.html – extra thanks to Fred Espenak for use permissions
* www.amsmeteors.org/meteor-showers/2016-meteor-shower-list/
* www.dl1dbc.net/Meteorscatter/meteortopics.html
* nssdc.gsfc.nasa.gov/planetary/factsheet/
* star.arm.ac.uk/~dja/shower/codes.html
And, of course:
* en.wikipedia.org/wiki/List_of_exceptional_asteroids
* en.wikipedia.org/wiki/88_modern_constellations
* en.wikipedia.org/wiki/List_of_meteor_showers
* en.wikipedia.org/wiki/List_of_brightest_stars
* en.wikipedia.org/wiki/Apparent_magnitude
* en.wikipedia.org/wiki/Stellar_classification
The Observational Astronomy Cheat Sheet (PDF) contains the following:
Page 1: The only three figures in the document, including the famous “finger how-to” for measuring distances in the night sky and a figure describing right ascension and declination (with values for many objects given in the tables).
Page 2: Moons And Planets – All of the standard information (and descriptions below) about the relative places of planets in the Solar System (distances, masses, temperatures, distances from Sun), then an extra column for our Moon.
Page 3: Best Meteor Showers – All of the categorized Class I, II, and III Meteor Showers throughout the year, including approximate peak dates, times, and directions.
Page 4: Marginal Meteor Showers – All of the categorized Class IV Meteor Showers (these are surely poor meteor showers for observing, but that fact that we’ve catalogued them there tells you how exhaustive astronomers have been in keeping track of periodicities in our day/nighttime sky).
Page 5: Winter And Spring Messier Objects – including abbreviations, NGC labels, types, distances (as best we know them), and Common Names.
Page 6: Summer And Autumn Messier Objects – including abbreviations, NGC labels, types, distances (as best we know them), and Common Names.
Page 7: Northern and Zodiacal Constellations – including family, origin, brightest star, and positional information.
Page 8: Southern Constellations – including family, origin, brightest star, and positional information.
Page 9: Top Asteroids – the best and brightest (and best identified), including distances, discovery information, and magnitudes (as available).
Page 10: Stars – the Top 50 brightest (with our Sun at its rightful position as #1), including constellation, magnitudes, distances, and mass and positional information.
Getting Around The Night Sky


Right Ascension And Declination

Moon And Planets
Moon And Planets | MERCURY | VENUS | EARTH | MOON | MARS | JUPITER | SATURN | URANUS | NEPTUNE |
Mass (x 1024 kg) | 0.33 | 4.87 | 5.97 | 0.073 | 0.642 | 1898.0 | 568.0 | 86.8 | 102.0 |
Equatorial Diameter (km) | 4879 | 12,104 | 12,756 | 3475 | 6792 | 142,984 | 120,536 | 51,118 | 49,528 |
Polar Diameter (km) | 4879 | 12,104 | 12,714 | 3475 | 6752 | 133,708 | 108,728 | 49,946 | 48,682 |
Avg. Diameter As 1/Earth | 0.383 | 0.950 | 1.000 | 0.273 | 0.532 | 10.863 | 9.001 | 3.968 | 3.856 |
Density (kg/m3) | 5427 | 5243 | 5514 | 3340 | 3933 | 1326 | 687 | 1271 | 1638 |
Gravity (m/s2) | 3.7 | 8.9 | 9.8 | 1.6 | 3.7 | 23.1 | 9.0 | 8.7 | 11.0 |
If 100 lbs* On Earth | 37.8 | 90.7 | 100.0 | 16.6 | 37.7 | 236.4 | 106.4 | 88.9 | 112.5 |
Escape Velocity (km/s) | 4.3 | 10.4 | 11.2 | 2.4 | 5.0 | 59.5 | 35.5 | 21.3 | 23.5 |
Rotation Period (hours) | 1407.6 | -5832.5 | 23.9 | 655.7 | 24.6 | 9.9 | 10.7 | -17.2 | 16.1 |
Length Of Day (hours) | 4222.6 | 2802.0 | 24.0 | 708.7 | 24.7 | 9.9 | 10.7 | 17.2 | 16.1 |
Dist. From Sun (x 106 km) | 57.9 | 108.2 | 149.6 | 0.384 | 227.9 | 778.6 | 1433.5 | 2872.5 | 4495.1 |
Distance From Sun (AU) | 0.39 | 0.73 | 1.0 | n/a | 1.38 | 5.20 | 9.58 | 19.22 | 30.10 |
Perihelion (x 106 km) | 46.0 | 107.5 | 147.1 | 0.363 | 206.6 | 740.5 | 1352.6 | 2741.3 | 4444.5 |
Aphelion (x 106 km) | 69.8 | 108.9 | 152.1 | 0.406 | 249.2 | 816.6 | 1514.5 | 3003.6 | 4545.7 |
Orbital Period (days) | 88.0 | 224.7 | 365.2 | 27.3 | 687.0 | 4331.0 | 10,747.0 | 30,589.0 | 59,800.0 |
Orbital Period (years) | 0.2 | 0.6 | 1.0 | 0.1 | 1.9 | 11.9 | 29.4 | 83.8 | 163.8 |
Orbital Velocity (km/s) | 47.4 | 35.0 | 29.8 | 1.0 | 24.1 | 13.1 | 9.7 | 6.8 | 5.4 |
Orbital Inclination (o) | 7.0 | 3.4 | 0.0 | 5.1 | 1.9 | 1.3 | 2.5 | 0.8 | 1.8 |
Orbital Eccentricity | 0.205 | 0.007 | 0.017 | 0.055 | 0.094 | 0.049 | 0.057 | 0.046 | 0.011 |
Obliq. To Orbit/Axial Tilt (o) | 0.01 | 177.4 | 23.4 | 6.7 | 25.2 | 3.1 | 26.7 | 97.8 | 28.3 |
Hill Sphere Radius | 94 | 167 | 235 | n/a | 320 | 740 | 1100 | 2700 | 4700 |
Geometric Albedo | 0.106 | 0.65 | 0.37 | 0.12 | 0.15 | 0.52 | 0.47 | 0.51 | 0.41 |
Mean Temp. (oC,oF) | 167,333 | 464,867 | 15,59 | -20,-4 | -65,-85 | -110,-166 | -140,-220 | -195,-320 | -200,-330 |
Highest Temp. (oC,oF) | 450,840 | 465,870 | 58,136 | 127,260 | 20,70 | n/a | n/a | n/a | n/a |
Lowest Temp. (oC,oF) | -170,-275 | 465,870 | -89,-129 | -173,-280 | -125,-195 | n/a | n/a | n/a | n/a |
Surface Pressure (bars) | 0 | 92 | 1 | 0 | 0.01 | ???? | ???? | ???? | ???? |
Number Of Moons | 0 | 0 | 1 | 0 | 2 | 79 | 82 | 27 | 14 |
Moons Visible In Binoculars | 0 | 0 | 1 | n/a | 0 | 4 | 1 | 0 | 0 |
Ring System? | No | No | No | No | No | Yes | Yes | Yes | Yes |
Global Magnetic Field? | Yes | No | Yes | No | No | Yes | Yes | Yes | Yes |
Best Meteor Showers
Best Meteor Showers | C | IAU | Activity Period | Maximum | S.L. | R.A. | Dec. | km/s | r | ZHR | Time | Originating Body |
*Antihelion Source | II | ANT | Dec 10 – Sep 10 | – | – | – | – | 30.0 | 3.0 | 4 | 01:00 | |
Quadrantids | I | QUA | Dec 30 – Jan 12 | Jan 4 | 283.2° | 15:24 | +48° 42’ | 40.9 | 2.1 | 120 | 05:00 | 2003 EH (Asteroid) |
Alpha Centaurids | II | ACE | Jan 28 – Feb 21 | Feb 8 | 319.2° | 14:00 | -59° 00’ | 56.0 | 2.0 | 6 | 05:00 | |
Lyrids | I | LYR | Apr 18 – Apr 25 | Apr 22 | 32.5° | 18:10 | +33° 12’ | 45.5 | 2.1 | 18 | 04:00 | C/1861 G1 (Thatcher) |
Pi Puppids | III | PPU | Apr 15 – Apr 28 | Apr 23 | 33.5° | 07:20 | -45° 00’ | 18.0 | 2.0 | var | 19:00 | |
Eta Aquariids | I | ETA | Apr 24 – May 19 | May 7 | 46.8° | 22:36 | -00° 30’ | 66.5 | 2.4 | 40 | 04:00 | 1P/Halley |
Eta Lyrids | II | ELY | May 05 – May 12 | May 10 | 50.0° | 19:24 | +43° 12’ | 43.4 | 3.0 | 3 | 04:00 | |
June Bootids | III | JBO | Jun 23 – Jun 25 | Jun 23 | 92.5° | 14:58 | +48° 00’ | 13.0 | 2.2 | var | 21:00 | |
Alpha Capricornids | II | CAP | Jul 06 – Aug 10 | Jul 26 | 127.0° | 20:18 | -10° 30’ | 21.8 | 2.5 | 5 | 01:00 | 169P/NEAT |
Delta Aquariids | I | SDA | Jul 21 – Aug 23 | Jul 28 | 128.0° | 22:42 | -16° 24’ | 42.0 | 3.2 | 16 | 03:00 | 96P/Machholz? |
Perseids | I | PER | Jul 13 – Aug 26 | Aug 12 | 140.0° | 03:12 | +57° 36’ | 60.5 | 2.2 | 100 | 04:00 | 109P/Swift-Tuttle |
Kappa Cygnids | II | KCG | Aug 06 – Aug 31 | Aug 17 | 145.0° | 18:30 | +58° 00’ | 22.7 | 3.0 | 3 | 23:00 | |
Aurigids | II | AUR | Aug 29 – Sep 04 | Aug 31 | 158.6° | 06:02 | +39° 18’ | 66.7 | 2.5 | 6 | 04:00 | |
Sept. Epsilon Perseids | II | SPE | Sep 05 – Sep 28 | Sep 9 | 167.0° | 03:12 | +39° 36’ | 64.5 | 3.0 | 5 | 05:00 | |
Draconids | III | GIA | Oct 06 – Oct 10 | Oct 9 | 196.0° | 17:28 | +56° 00’ | 19.0 | 2.6 | var | 18:00 | |
Southern Taurids | II | STA | Sep 07 – Nov 19 | Oct 10 | 197.0° | 02:06 | +08° 42’ | 28.9 | 2.3 | 5 | 02:00 | 2P/Encke |
Orionids | I | ORI | Aug 25 – Nov 19 | Oct 22 | 208.9° | 06:24 | +15° 30’ | 67.1 | 2.5 | 15 | 05:00 | 1P/Halley |
Epsilon Geminids | II | EGE | Sep 29 – Nov 02 | Oct 22 | 209.0° | 06:58 | +27° 36’ | 69.6 | 3.0 | 3 | 05:00 | |
Leonis Minorids | II | LMI | Oct 17 – Oct 27 | Oct 22 | 209.0° | 10:40 | +36° 42’ | 59.9 | 3.0 | 2 | 05:00 | |
Andromedids | III | AND | Oct 26 – Nov 20 | Nov 8 | 226.0° | 01:31 | +29° 24’ | 15.9 | 2.5 | var | 22:00 | |
Northern Taurids | II | NTA | Oct 25 – Dec 04 | Nov 11 | 229.0° | 03:54 | +22° 24’ | 27.1 | 2.3 | 5 | 00:00 | 2P/Encke |
Leonids | I | LEO | Nov 05 – Dec 03 | Nov 18 | 236.1° | 10:17 | +21° 30’ | 69.7 | 2.5 | 15 | 05:00 | 55P/Tempel-Tuttle |
Alpha Monocerotids | III | AMO | Nov 21 – Nov 23 | Nov 21 | 239.3° | 07:52 | +01° 00’ | 68.0 | 2.4 | var | 03:00 | |
November Orionids | II | NOO | Nov 13 – Dec 07 | Nov 28 | 247.0° | 06:02 | +15° 30’ | 43.7 | 3.0 | 3 | 04:00 | |
Sigma Hydrids | II | HYD | Nov 24 – Dec 21 | Dec 6 | 254.0° | 08:16 | +02° 42’ | 60.7 | 3.0 | 3 | 03:00 | |
Dec Phoenicids | III | PHO | Nov 28 – Dec 09 | Dec 6 | 254.3° | 01:12 | -53° 00’ | 18.0 | 2.8 | var | 20:00 | |
Puppid/Velids | II | PUP | Dec 01 – Dec 15 | Dec 7 | 255.0° | 08:12 | -45° 00’ | 40.0 | 2.9 | 10 | 04:00 | |
Monocerotids | II | MON | Nov 27 – Dec 17 | Dec 9 | 257.0° | 06:40 | +08° 18’ | 40.5 | 3.0 | 2 | 01:00 | |
Geminids | I | GEM | Nov 30 – Dec 17 | Dec 13 | 261.5° | 07:33 | +32° 24’ | 33.7 | 2.6 | 120 | 01:00 | 3200 Phaethon (Ast.) |
Dec. Leonis Minorids | II | DLM | Dec 06 – Jan 18 | Dec 20 | 269.0° | 10:50 | +30° 00’ | 63.1 | 3.0 | 5 | 05:00 | |
Ursids | I | URS | Dec 17 – Dec 24 | Dec 22 | 270.7° | 14:30 | +74° 48’ | 32.6 | 3.0 | 10 | 05:00 | 8P/Tuttle |
Coma Berenicids | II | COM | Dec 24 – Jan 03 | Dec 31 | 280.0° | 12:22 | +11° 42’ | 69.7 | 3.0 | 5 | 05:00 |
Marginal Meteor Showers
Marginal Meteor Showers | C | IAU | Activity Period | Maximum | S.L. | R.A. | Dec. | km/s | ZHR | Time |
January Leonids | IV | JLE | Dec 30 – Jan 05 | Jan 2 | 281.0° | 09:46 | +24o 18’ | 59.4 | <2 | 03:00 |
Xi Coronae Borealids | IV | XCB | Jan 11 – Jan 18 | Jan 15 | 295.0° | 16:36 | +30o 00’ | 49.0 | <2 | 05:00 |
Canum Venaticids | IV | CVN | Jan 13 – Jan 18 | Jan 15 | 295.0° | 14:00 | +38o 00’ | 56.0 | <2 | 05:00 |
Lambda Bootids | IV | LBO | Jan 17 – Jan 18 | Jan 17 | 297.0° | 14:48 | +45o 00’ | 41.0 | <2 | 05:00 |
January Xi Ursae Majorids | IV | XUM | Jan 16 – Jan 20 | Jan 18 | 298.0° | 11:16 | +33o 00’ | 44.0 | <2 | 03:00 |
Nu Bootids | IV | NBO | Jan 16 – Jan 20 | Jan 18 | 298.0° | 13:44 | +13o 00’ | 67.0 | <2 | 05:00 |
Gamma Ursae Minorids | IV | GUM | Jan 18 – Jan 24 | Jan 20 | 300.0° | 15:12 | +67o 00’ | 30.0 | <2 | 05:00 |
Eta Corvids | IV | ECV | Jan 18 – Jan 26 | Jan 23 | 303.0° | 12:56 | -17o 00’ | 69.0 | <2 | 05:00 |
January Comae Berenicids | IV | JCO | Jan 21 – Jan 27 | Jan 24 | 304.0° | 12:52 | +15o 00’ | 65.0 | <2 | 05:00 |
Alpha Coronae Borealids | IV | ACB | Jan 27 – Feb 05 | Jan 28 | 308.0° | 15:24 | +26o 00’ | 57.0 | <2 | 05:00 |
February Eta Draconids | IV | FED | Feb 03 – Feb 06 | Feb 4 | 315.0° | 15:59 | +61o 00’ | 32.0 | <2 | 05:00 |
February Epsilon Virginids | IV | FEV | Jan 29 – Feb 09 | Feb 4 | 315.0° | 13:24 | +11o 00’ | 64.0 | <2 | 05:00 |
Pi Hydrids | IV | PIH | Feb 04 – Feb 15 | Feb 7 | 318.0° | 14:00 | -21o 00’ | 55.3 | <2 | 05:00 |
Omega Centaurids | IV | OCA | Feb 12 – Feb 16 | Feb 14 | 325.0° | 13:16 | -55o 00’ | 48.0 | <2 | 05:00 |
Theta Centaurids | IV | TCN | Feb 12 – Feb 16 | Feb 14 | 325.0° | 13:56 | -29o 00’ | 65.0 | <2 | 05:00 |
Beta Herculids | IV | BHE | Feb 13 – Feb 16 | Feb 14 | 325.0° | 16:24 | +25o 00’ | 53.0 | <2 | 05:00 |
February Mu Virginids | IV | FMV | Feb 16 – Mar 04 | Feb 26 | 337.0° | 16:12 | -02o 00’ | 62.0 | <2 | 05:00 |
Xi Herculids | IV | XHE | Mar 10 – Mar 15 | Mar 12 | 352.0° | 17:04 | +48o 30’ | 35.0 | <2 | 05:00 |
Gamma Normids | IV | GNO | Mar 23 – Mar 28 | Mar 24 | 004.0° | 16:24 | -51o 00’ | 68.0 | <2 | 05:00 |
Zeta Cygnids | IV | ZCY | Apr 03 – Apr 10 | Apr 5 | 016.0° | 20:08 | +40o 00’ | 40.0 | <2 | 04:00 |
Delta Aquiliids | IV | DAL | Apr 07 – Apr 13 | Apr 9 | 020.0° | 20:32 | +12o 00’ | 63.0 | <2 | 04:00 |
Sigma Leonids A | IV | SLE | Apr 08 – Apr 25 | Apr 15 | 026.0° | 13:24 | +03o 00’ | 19.0 | <2 | 01:00 |
April Rho Cygnids | IV | AEC | Apr 11 – May 04 | Apr 22 | 033.0° | 20:56 | +44o 30’ | 42.0 | <2 | 04:00 |
H Virginids | IV | HVI | Apr 29 – May 03 | May 1 | 041.0° | 13:40 | -11o 00’ | 17.0 | <2 | 04:00 |
Gamma Aquiliids | IV | GAQ | May 05 – May 12 | May 8 | 048.0° | 20:28 | +14o 30’ | 66.0 | <2 | 01:00 |
Theta 2 Sagittariids | IV | TTS | May 09 – May 14 | May 13 | 053.0° | 20:04 | -33o 00’ | 67.0 | <2 | 01:00 |
May Beta Capricornids | IV | MBC | May 16 – May 21 | May 19 | 059.0° | 20:20 | -15o 00’ | 68.0 | <2 | 01:00 |
June Mu Cassiopeiids | IV | JMC | May 31 – Jun 05 | Jun 1 | 071.0° | 00:44 | +53o 00’ | 42.0 | <2 | 04:00 |
Daytime Arietids | IV | ARI | May 14 – Jun 24 | Jun 7 | 076.7° | 02:56 | +23o 30’ | 42.0 | <2 | 04:00 |
June Rho Cygnids | IV | JRC | Jun 14 – Jun 16 | Jun 14 | 084.0° | 21:22 | +44o 42’ | 48.0 | <2 | 00:00 |
Northern June Aquilids | IV | NZC | Jun 10 – Jun 26 | Jun 16 | 086.0° | 19:53 | -10o 00’ | 41.0 | <2 | 04:00 |
Delta Piscids | IV | DPI | Jun 20 – Jun 26 | Jun 23 | 092.0° | 00:44 | +05o 00’ | 69.0 | <2 | 04:00 |
June Iota Pegasids | IV | JIP | Jun 24 – Jun 26 | Jun 24 | 093.5° | 22:06 | +29o 00’ | 59.0 | <2 | 04:00 |
Sigma Capricornids | IV | SCA | Jun 19 – Jul 24 | Jun 27 | 096.0° | 20:25 | -07o 00’ | 41.0 | <2 | 04:00 |
F Ophiuchids | IV | FOP | Jun 29 – Jul 01 | Jun 29 | 098.0° | 17:40 | +07o 30’ | 17.0 | <2 | 04:00 |
Pi Piscids | IV | PPS | Jun 11 – Jul 25 | Jul 1 | 101.0° | 01:00 | +25o 00’ | 67.6 | <2 | 04:00 |
July Pegasids | IV | JPE | Jun 30 – Aug 03 | Jul 10 | 108.0° | 23:12 | +11o 00’ | 68.1 | <2 | 04:00 |
C Andromedids | IV | CAN | Jun 26 – Jul 20 | Jul 12 | 110.0° | 02:10 | +47o 30’ | 60.1 | <2 | 04:00 |
Psi Cassiopeiids | IV | PCA | Jul 12 – Jul 18 | Jul 16 | 114.0° | 02:52 | +70o 00’ | 46.0 | <2 | 04:00 |
Tau Cetids | IV | TCT | Jul 20 – Jul 23 | Jul 21 | 119.0° | 01:52 | -18o 00’ | 65.0 | <2 | 04:00 |
July Gamma Draconids | IV | GDR | Jul 25 – Jul 29 | Jul 27 | 125.0° | 18:42 | +50o 30’ | 26.5 | <2 | 00:00 |
Eta Eridanids | IV | ERI | Jul 31 – Aug 17 | Aug 5 | 133.0° | 02:53 | -12o 18’ | 65.7 | <2 | 04:00 |
Beta Perseids | IV | BPE | Jul 24 – Aug 20 | Aug 7 | 135.0° | 02:57 | +37o 36’ | 67.0 | <2 | 04:00 |
Theta Piscids | IV | TPI | Aug 08 – Sep 01 | Aug 19 | 147.0° | 23:28 | +04o 60’ | 39.0 | <2 | 04:00 |
August Gamma Cepheids | IV | AGC | Aug 22 – Sep 01 | Aug 28 | 155.0° | 00:04 | +77o 00’ | 41.0 | <2 | 04:00 |
September Lyncids | IV | SLY | Sep 07 – Sep 18 | Sep 9 | 167.0° | 06:22 | +55o 42’ | 59.7 | <2 | 05:00 |
September Iota Cassiopeiids | IV | SIC | Sep 10 – Sep 16 | Sep 14 | 172.0° | 03:04 | +64o 00’ | 55.0 | <2 | 03:00 |
September Pi Orionids | IV | POR | Sep 16 – Sep 20 | Sep 18 | 176.0° | 04:08 | +06o 00’ | 66.0 | <2 | 04:00 |
Beta Aurigids | IV | BAU | Sep 21 – Sep 25 | Sep 22 | 180.0° | 05:50 | +48o 00’ | 69.0 | <2 | 05:00 |
Delta Aurigids | IV | DAU | Sep 23 – Sep 29 | Sep 26 | 184.0° | 05:08 | +57o 30’ | 61.0 | <2 | 05:00 |
Sep-Oct Lyncids | IV | SOL | Sep 27 – Sep 30 | Sep 28 | 186.0° | 07:26 | +47o 00’ | 65.0 | <2 | 05:00 |
Daytime Sextantids | IV | DSX | Sep 25 – Oct 05 | Sep 28 | 186.0° | 10:16 | -01o 00’ | 33.0 | <2 | 05:00 |
October Camelopardalids | IV | OCT | Oct 05 – Oct 06 | Oct 5 | 192.6° | 11:12 | +78o 30’ | 44.0 | <2 | 05:00 |
Psi Aurigids | IV | ZTA | Oct 09 – Oct 16 | Oct 13 | 200.0° | 07:19 | +43o 00’ | 67.0 | <2 | 05:00 |
October Ursa Majorids | IV | OCU | Oct 14 – Oct 18 | Oct 15 | 202.0° | 09:36 | +64o 18’ | 52.4 | <2 | 05:00 |
Tau Cancrids | IV | TCA | Oct 09 – Oct 25 | Oct 17 | 204.0° | 08:57 | +29o 24’ | 67.8 | <2 | 05:00 |
Gamma Piscids | IV | GPS | Oct 14 – Oct 21 | Oct 17 | 204.0° | 01:10 | +16o 48’ | 20.8 | <2 | 05:00 |
October Lyncids | IV | OLY | Oct 16 – Oct 24 | Oct 20 | 207.0° | 07:24 | +64o 18’ | 63.0 | <2 | 05:00 |
Eta Taurids | IV | ETT | Oct 15 – Oct 29 | Oct 24 | 211.0° | 03:40 | +23o 00’ | 45.0 | <2 | 05:00 |
Lambda Ursa Majorids | IV | LUM | Oct 24 – Nov 01 | Oct 27 | 214.0° | 10:24 | +48o 54’ | 61.5 | <2 | 05:00 |
Southern Lambda Draconids | IV | SLD | Oct 24 – Nov 02 | Oct 27 | 214.0° | 11:24 | +48o 54’ | 62.5 | <2 | 05:00 |
Chi Taurids | IV | CTA | Nov 04 – Nov 08 | Nov 5 | 223.0° | 04:22 | +25o 00’ | 46.0 | <2 | 05:00 |
Kappa Ursae Majorids | IV | KUM | Nov 02 – Nov 09 | Nov 5 | 223.0° | 09:44 | +45o 30’ | 62.0 | <2 | 05:00 |
Nov. Iota Draconids | IV | NID | Nov 22 – Dec 01 | Nov 21 | 239.0° | 12:40 | +69o 00’ | 41.0 | <2 | 05:00 |
Dec. Phi Cassiopeiids | IV | DPC | Nov 26 – Dec 05 | Dec 1 | 249.0° | 01:33 | +52o 36’ | 13.9 | <2 | 05:00 |
December Kappa Draconids | IV | KDR | Dec 02 – Dec 06 | Dec 3 | 251.0° | 12:22 | +70o 24’ | 41.4 | <2 | 05:00 |
Psi Ursa Majorids | IV | PSU | Dec 01 – Dec 16 | Dec 4 | 252.0° | 11:16 | +43o 42’ | 60.5 | <2 | 05:00 |
Alpha Draconids A | IV | DAD | Dec 05 – Dec 18 | Dec 7 | 255.0° | 13:40 | +60o 06’ | 41.3 | <2 | 05:00 |
Eta Hydrids | IV | EHY | Dec 10 – Dec 18 | Dec 12 | 260.0° | 09:08 | +01o 30’ | 63.0 | <2 | 04:00 |
December Chi Virginids | IV | XVI | Dec 08 – Dec 24 | Dec 16 | 265.0° | 12:52 | -11o 12’ | 69.2 | <2 | 04:00 |
December Sigma Virginids | IV | DSV | Dec 06 – Dec 31 | Dec 23 | 272.0° | 13:55 | +04o 00’ | 68.2 | <2 | 05:00 |
C Velids | IV | CVE | Dec 27 – Dec 30 | Dec 28 | 277.0° | 09:20 | -54o 00’ | 39.0 | <2 | 05:00 |
Alpha Draconids B | IV | DAD | Dec 26 – Jan 01 | Dec 29 | 278.0° | 14:51 | +53o 30’ | 41.5 | <2 | 05:00 |
Alpha Hydrids | IV | AHY | Dec 22 – Jan 07 | Dec 31 | 280.0° | 08:24 | -07o 24’ | 43.0 | <2 | 01:00 |
Messier Objects And Best Seasons To Observe – Winter And Spring
Winter | Constellation | IAU | NGC | Type | Mag. | Size | Dist. (ly) | R.A. | Dec. | Common Name |
M36 | Auriga | Aur | 1960 | Oc | 6.3 | 12.0 | 4,100 | 05:36.1 | +34° 08' | |
M37 | Auriga | Aur | 2099 | Oc | 6.2 | 24.0 | 4,400 | 05:52.4 | +32° 33' | |
M38 | Auriga | Aur | 1912 | Oc | 7.4 | 21.0 | 4,200 | 05:28.7 | +35° 50' | |
M41 | Canis Major | CMa | 2287 | Oc | 4.6 | 38.0 | 2,300 | 06:47.0 | -20° 44' | |
M44 | Cancer | Cnc | 2632 | Oc | 3.7 | 95.0 | 577 | 08:40.1 | +19° 59' | Beehive Cluster |
M67 | Cancer | Cnc | 2682 | Oc | 6.1 | 30.0 | 2,700 | 08:50.4 | +11° 49' | |
M35 | Gemini | Gem | 2168 | Oc | 5.3 | 28.0 | 2,800 | 06:08.9 | +24° 20' | |
M48 | Hydra | Hya | 2548 | Oc | 5.5 | 54.0 | 1,500 | 08:13.8 | -05° 48' | |
M79 | Lepus | Lep | 1904 | Gc | 7.7 | 8.7 | 42,100 | 05:24.5 | -24° 33' | |
M50 | Monoceros | Mon | 2323 | Oc | 6.3 | 16.0 | 3,000 | 07:03.2 | -08° 20' | |
M42 | Orion | Ori | 1976 | Di | 4.0 | 85×60 | 1,600 | 05:35.4 | -05° 27' | Great Nebula in Orion |
M43 | Orion | Ori | 1982 | Di | 9.0 | 20×15 | 1,600 | 05:35.6 | -05° 16' | De Mairan's Nebula |
M78 | Orion | Ori | 2068 | Di | 8.3 | 8×6 | 1,600 | 05:46.7 | +00° 03' | |
M46 | Puppis | Pup | 2437 | Oc | 6.0 | 27.0 | 5,400 | 07:41.8 | -14° 49' | |
M47 | Puppis | Pup | 2422 | Oc | 5.2 | 30.0 | 1,600 | 07:36.6 | -14° 30' | |
M93 | Puppis | Pup | 2447 | Oc | 6.0 | 22.0 | 3,600 | 07:44.6 | -23° 52' | |
M1 | Taurus | Tau | 1952 | Sn | 8.4 | 6×4 | 6,300 | 05:34.5 | +22° 01' | Crab Nebula |
M45 | Taurus | Tau | – | Oc | 1.6 | 110.0 | 380 | 03:47.0 | +24° 07' | Pleiades |
Spring | Constellation | IAU | NGC | Type | Mag. | Size | Dist. (ly) | R.A. | Dec. | Common Name |
M53 | Coma Berenices | Com | 5024 | Gc | 7.6 | 12.6 | 59,700 | 13:12.9 | +18° 10' | |
M64 | Coma Berenices | Com | 4826 | Sp | 8.5 | 9.3×5.4 | 19 mil | 12:56.7 | +21° 41' | Black Eye Galaxy |
M85 | Coma Berenices | Com | 4382 | Ln | 9.1 | 7.1×5.2 | 60 mil | 12:25.5 | +18° 12' | |
M88 | Coma Berenices | Com | 4501 | Sp | 9.6 | 7×4 | 60 mil | 12:32.1 | +14° 26' | |
M91 | Coma Berenices | Com | 4548 | Ba | 10.2 | 5.4×4.4 | 60 mil | 12:35.5 | +14° 30' | |
M98 | Coma Berenices | Com | 4192 | Sp | 10.1 | 9.5×3.2 | 60 mil | 12:13.9 | +14° 55' | |
M99 | Coma Berenices | Com | 4254 | Sp | 9.9 | 5.4×4.8 | 60 mil | 12:18.9 | +14° 26' | |
M100 | Coma Berenices | Com | 4321 | Sp | 9.3 | 7×6 | 60 mil | 12:23.0 | +15° 50' | |
M3 | Canes Venatici | CVn | 5272 | Gc | 6.2 | 16.2 | 33,900 | 13:42.2 | +28° 23' | |
M51 | Canes Venatici | CVn | 5194 | Sp | 8.4 | 11×7 | 37 mil | 13:30.0 | +47° 11' | Whirlpool Galaxy |
M63 | Canes Venatici | CVn | 5055 | Sp | 8.6 | 10×6 | 37 mil | 13:15.8 | +42° 02' | Sunflower Galaxy |
M94 | Canes Venatici | CVn | 4736 | Sp | 8.2 | 7×3 | 15 mil | 12:50.9 | +41° 08' | |
M106 | Canes Venatici | CVn | 4258 | Sp | 8.4 | 19×8 | 25 mil | 12:18.9 | +47° 19' | |
M68 | Hydra | Hya | 4590 | Gc | 7.8 | 12.0 | 33,300 | 12:39.5 | -26° 45' | |
M83 | Hydra | Hya | 5236 | Sp | 7.6 | 11×10 | 15 mil | 13:37.0 | -29° 52' | Southern Pinwheel |
M65 | Leo | Leo | 3623 | Sp | 9.3 | 8×1.5 | 35 mil | 11:18.9 | +13° 05' | |
M66 | Leo | Leo | 3627 | Sp | 8.9 | 8×2.5 | 35 mil | 11:20.2 | +12° 59' | |
M95 | Leo | Leo | 3351 | Ba | 9.7 | 4.4×3.3 | 38 mil | 10:44.0 | +11° 42' | |
M96 | Leo | Leo | 3368 | Sp | 9.2 | 6×4 | 38 mil | 10:46.8 | +11° 49' | |
M105 | Leo | Leo | 3379 | El | 9.3 | 2.0 | 38 mil | 10:47.8 | +12° 35' | |
M40 | Ursa Major | UMa | Win4 | Ds | 8.4 | 0.8 | 510 | 12:22.4 | +58° 05' | Winnecke 4 |
M81 | Ursa Major | UMa | 3031 | Sp | 6.9 | 21×10 | 12 mil | 09:55.6 | +69° 04' | Bode's Galaxy |
M82 | Ursa Major | UMa | 3034 | Ir | 8.4 | 9×4 | 12 mil | 09:55.8 | +69° 41' | Cigar Galaxy |
M97 | Ursa Major | UMa | 3587 | Pl | 9.9 | 3.4×3.3 | 2,600 | 11:14.8 | +55° 01' | Owl Nebula |
M101 | Ursa Major | UMa | 5457 | Sp | 7.9 | 22.0 | 27 mil | 14:03.2 | +54° 21' | Pinwheel Galaxy |
M108 | Ursa Major | UMa | 3556 | Sp | 10.0 | 8×1 | 45 mil | 11:11.5 | +55° 40' | |
M109 | Ursa Major | UMa | 3992 | Ba | 9.8 | 7×4 | 55 mil | 11:57.6 | +53° 23' | |
M49 | Virgo | Vir | 4472 | El | 8.4 | 9×7.5 | 60 mil | 12:29.8 | +08° 00' | |
M58 | Virgo | Vir | 4579 | Ba | 9.7 | 5.5×4.5 | 60 mil | 12:37.7 | +11° 49' | |
M59 | Virgo | Vir | 4621 | El | 9.6 | 5×3.5 | 60 mil | 12:42.0 | +11° 39' | |
M60 | Virgo | Vir | 4649 | El | 8.8 | 7×6 | 60 mil | 12:43.7 | +11° 33' | |
M61 | Virgo | Vir | 4303 | Sp | 9.7 | 6×5.5 | 60 mil | 12:21.9 | +04° 28' | |
M84 | Virgo | Vir | 4374 | Ln | 9.1 | 5.0 | 60 mil | 12:25.1 | +12° 53' | |
M86 | Virgo | Vir | 4406 | Ln | 8.9 | 7.5×5.5 | 60 mil | 12:26.2 | +12° 57' | |
M87 | Virgo | Vir | 4486 | El | 8.6 | 7.0 | 60 mil | 12:30.8 | +12° 24' | |
M89 | Virgo | Vir | 4552 | El | 9.8 | 4.0 | 60 mil | 12:35.7 | +12° 33' | |
M90 | Virgo | Vir | 4569 | Sp | 9.5 | 9.5×4.5 | 60 mil | 12:36.8 | +13° 10' | |
M104 | Virgo | Vir | 4594 | Sp | 8.0 | 9×4 | 50 mil | 12:40.0 | -11° 37' | Sombrero Galaxy |
Messier Objects And Best Seasons To Observe – Summer And Autumn
Summer | Constellation | IAU | NGC | Type | Mag. | Size | Dist. (ly) | R.A. | Dec. | Common Name |
M72 | Aquarius | Aqr | 6981 | Gc | 9.3 | 5.9 | 55,400 | 20:53.5 | -12° 32' | |
M73 | Aquarius | Aqr | 6994 | As | 9 | 2.8 | 2,000 | 20:59.0 | -12° 38' | |
M29 | Cygnus | Cyg | 6913 | Oc | 7.1 | 7.0 | 4,000 | 20:23.9 | +38° 32' | |
M102 | Draco | Dra | 5866 | Ln | 9.9 | 5.2×2.3 | 40 mil | 15:06.5 | +55° 46' | |
M13 | Hercules | Her | 6205 | Gc | 5.8 | 16.6 | 25,100 | 16:41.7 | +36° 28' | Great Hercules Globular |
M92 | Hercules | Her | 6341 | Gc | 6.4 | 11.2 | 26,700 | 17:17.1 | +43° 08' | |
M56 | Lyra | Lyr | 6779 | Gc | 8.3 | 7.1 | 32,900 | 19:16.6 | +30° 11' | |
M57 | Lyra | Lyr | 6720 | Pl | 8.8 | 1.4×1.0 | 2,300 | 18:53.6 | +33° 02' | Ring Nebula |
M9 | Ophiuchus | Oph | 6333 | Gc | 7.7 | 9.3 | 26,700 | 17:19.2 | -18° 31' | |
M10 | Ophiuchus | Oph | 6254 | Gc | 6.6 | 15.1 | 14,400 | 16:57.1 | -04° 06' | |
M12 | Ophiuchus | Oph | 6218 | Gc | 6.7 | 14.5 | 16,000 | 16:47.2 | -01° 57' | |
M14 | Ophiuchus | Oph | 6402 | Gc | 7.6 | 11.7 | 29,000 | 17:37.6 | -03° 15' | |
M19 | Ophiuchus | Oph | 6273 | Gc | 6.8 | 13.5 | 28,400 | 17:02.6 | -26° 16' | |
M62 | Ophiuchus | Oph | 6266 | Gc | 6.5 | 14.1 | 22,500 | 17:01.2 | -30° 07' | |
M107 | Ophiuchus | Oph | 6171 | Gc | 7.9 | 10.0 | 20,900 | 16:32.5 | -13° 03' | |
M4 | Scorpius | Sco | 6121 | Gc | 5.6 | 26.3 | 7,200 | 16:23.6 | -26° 32' | |
M6 | Scorpius | Sco | 6405 | Oc | 4.2 | 25.0 | 1,600 | 17:40.1 | -32° 13' | Butterfly Cluster |
M7 | Scorpius | Sco | 6475 | Oc | 3.3 | 80.0 | 800 | 17:53.9 | -34° 49' | Ptolemy's Cluster |
M80 | Scorpius | Sco | 6093 | Gc | 7.3 | 8.9 | 32,600 | 16:17.0 | -22° 59' | |
M11 | Scutum | Sct | 6705 | Oc | 6.3 | 14.0 | 6,000 | 18:51.1 | -06° 16' | Wild Duck Cluster |
M26 | Scutum | Sct | 6694 | Oc | 8 | 15.0 | 5,000 | 18:45.2 | -09° 24' | |
M5 | Serpens | Ser | 5904 | Gc | 5.6 | 17.4 | 24,500 | 15:18.6 | +02° 05' | |
M16 | Serpens | Ser | 6611 | Oc | 6.4 | 7.0 | 7,000 | 18:18.8 | -13° 47' | Eagle Nebula |
M71 | Sagitta | Sge | 6838 | Gc | 8.2 | 7.2 | 12,700 | 19:53.8 | +18° 47' | |
M8 | Sagittarius | Sgr | 6523 | Di | 6 | 90×40 | 5,200 | 18:03.8 | -24° 23' | Lagoon Nebula |
M17 | Sagittarius | Sgr | 6618 | Di | 7 | 11.0 | 5,000 | 18:20.8 | -16° 11' | Omega Nebula |
M18 | Sagittarius | Sgr | 6613 | Oc | 7.5 | 9.0 | 4,900 | 18:19.9 | -17° 08' | |
M20 | Sagittarius | Sgr | 6514 | Di | 9 | 28.0 | 5,200 | 18:02.6 | -23° 02' | Trifid Nebula |
M21 | Sagittarius | Sgr | 6531 | Oc | 6.5 | 13.0 | 4,250 | 18:04.6 | -22° 30' | |
M22 | Sagittarius | Sgr | 6656 | Gc | 5.1 | 24.0 | 10,400 | 18:36.4 | -23° 54' | Sagittarius Cluster |
M23 | Sagittarius | Sgr | 6494 | Oc | 6.9 | 27.0 | 2,150 | 17:56.8 | -19° 01' | |
M24 | Sagittarius | Sgr | – | MW | 4.6 | 90.0 | 10,000 | 18:16.9 | -18° 30' | Sagittarius Star Cloud |
M25 | Sagittarius | Sgr | IC4725 | Oc | 6.5 | 40.0 | 2,000 | 18:31.6 | -19° 15' | |
M28 | Sagittarius | Sgr | 6626 | Gc | 6.8 | 11.2 | 18,600 | 18:24.5 | -24° 52' | |
M54 | Sagittarius | Sgr | 6715 | Gc | 7.6 | 9.1 | 88,700 | 18:55.1 | -30° 29' | |
M55 | Sagittarius | Sgr | 6809 | Gc | 6.3 | 19.0 | 17,600 | 19:40.0 | -30° 58' | |
M69 | Sagittarius | Sgr | 6637 | Gc | 7.6 | 7.1 | 28,000 | 18:31.4 | -32° 21' | |
M70 | Sagittarius | Sgr | 6681 | Gc | 7.9 | 7.8 | 29,400 | 18:43.2 | -32° 18' | |
M75 | Sagittarius | Sgr | 6864 | Gc | 8.5 | 6.0 | 61,300 | 20:06.1 | -21° 55' | |
M27 | Vulpecula | Vul | 6853 | Pl | 7.4 | 8.0×5.7 | 1,250 | 19:59.6 | +22° 43' | Dumbbell Nebula |
Autumn | Constellation | IAU | NGC | Type | Mag. | Size | Dist. (ly) | R.A. | Dec. | Common Name |
M31 | Andromeda | And | 224 | Sp | 3.4 | 178×63 | 3 mil | 00:41.8 | +41° 16' | Andromeda Galaxy |
M32 | Andromeda | And | 221 | El | 8.1 | 8×6 | 3 mil | 00:42.8 | +40° 52' | |
M110 | Andromeda | And | 205 | El | 8.5 | 17×10 | 3 mil | 00:40.4 | +41° 41' | |
M2 | Aquarius | Aqr | 7089 | Gc | 6.5 | 12.9 | 37,900 | 21:33.5 | +00° 49' | |
M30 | Capricorn | Cap | 7099 | Gc | 7.2 | 11.0 | 26,100 | 21:40.4 | -23° 11' | |
M52 | Cassiopeia | Cas | 7654 | Oc | 7.3 | 13.0 | 5,000 | 23:24.2 | +61° 35' | |
M103 | Cassiopeia | Cas | 581 | Oc | 7.4 | 6.0 | 8,500 | 01:33.2 | +60° 42' | |
M77 | Cetus | Cet | 1068 | Sp | 8.9 | 7×6 | 60 mil | 02:42.7 | +00° 02' | |
M39 | Cygnus | Cyg | 7092 | Oc | 4.6 | 32.0 | 825 | 21:32.2 | +48° 26' | |
M15 | Pegasus | Peg | 7078 | Gc | 6.2 | 12.3 | 33,600 | 21:30.0 | +12° 10' | Great Pegasus Globular |
M34 | Perseus | Per | 1039 | Oc | 5.5 | 35.0 | 1,400 | 02:42.0 | +42° 47' | |
M76 | Perseus | Per | 650 | Pl | 10.1 | 2.7×1.8 | 3,400 | 01:42.4 | +51° 34' | Little Dumbbell Nebula |
M74 | Pisces | Psc | 628 | Sp | 9.4 | 10.2×9.5 | 35 mil | 01:36.7 | +15° 47' | |
M33 | Triangulum | Tri | 598 | Sp | 5.7 | 73×45 | 3 mil | 01:33.9 | +30° 39' | Triangulum Galaxy |
Northern & Zodiacal Constellations In The Western Tradition
Northern Con. | IUA | Meaning | Family | Origin | Brightest Star | R.A. | Dec. | Quad | %Sky | R |
Andromeda | And | Andromeda | Perseus | Ptolemy | Alpheratz | 00:48.46 | +37o 25.91’ | NQ1 | 1.75% | 19 |
Aquila | Aql | Eagle | Hercules | Ptolemy | Altair | 22:17.38 | ?10o 47.35’ | SQ4 | 2.38% | 10 |
Auriga | Aur | Charioteer | Perseus | Ptolemy | Capella | 06:04.42 | +42o 01.68’ | NQ2 | 1.59% | 21 |
Boötes | Boo | Herdsmen | Ursa Major | Ptolemy | Arcturus | 14:42.64 | +31o 12.16’ | NQ3 | 2.20% | 13 |
Camelopardalis | Cam | Giraffe | Ursa Major | 1613, Plancius | b Camelopardalis | 08:51.37 | +69o 22.89’ | NQ2 | 1.83% | 18 |
Canes Venatici | CVn | Hunting Dogs | Ursa Major | 1690, Hevelius | Cor Caroli | 08:41.70 | ?63o 13.16’ | SQ2 | 1.20% | 34 |
Cassiopeia | Cas | Cassiopeia | Perseus | Ptolemy | Shedir | 10:41.53 | ?79o 12.30’ | SQ2 | 0.32% | 79 |
Cepheus | Cep | Cepheus | Perseus | Ptolemy | Alderamin | 06:49.74 | ?22o 08.42’ | SQ2 | 0.92% | 43 |
Coma Berenices | Com | Berenice's Hair | Ursa Major | 1603, Uranomet. | b Comae Berenices | 18:38.79 | ?41o 08.85’ | SQ4 | 0.31% | 80 |
Corona Borealis | CrB | Northern Crown | Ursa Major | Ptolemy | Alphecca | 11:23.75 | ?15o 55.74’ | SQ2 | 0.68% | 53 |
Cygnus | Cyg | Swan | Hercules | Ptolemy | Deneb | 20:35.28 | +44o 32.70’ | NQ4 | 1.95% | 16 |
Delphinus | Del | Dolphin | Heav. Wat. | Ptolemy | Rotanev | 20:41.61 | +11o 40.26’ | NQ4 | 0.46% | 69 |
Draco | Dra | Dragon | Ursa Major | Ptolemy | Etamin | 15:08.64 | +67o 00.40’ | NQ3 | 2.63% | 8 |
Equuleus | Equ | Filly | Heav. Wat. | Ptolemy | Kitalpha | 21:11.26 | +07o 45.49’ | NQ4 | 0.17% | 87 |
Hercules | Her | Hercules | Hercules | Ptolemy | Kornephoros | 17:23.16 | +27o 29.93’ | NQ3 | 2.97% | 5 |
Hydra | Hya | Sea Serpent | Hercules | Ptolemy | Alphard | 11:36.73 | ?14o 31.91’ | SQ2 | 3.16% | 1 |
Lacerta | Lac | Lizard | Perseus | 1690, Hevelius | a Lacertae | 22:27.68 | +46o 02.51’ | NQ4 | 0.49% | 68 |
Leo Minor | LMi | Little Lion | Ursa Major | 1690, Hevelius | Praecipua | 05:33.95 | ?19o 02.78’ | SQ1 | 0.70% | 51 |
Lynx | Lyn | Lynx | Ursa Major | 1690, Hevelius | Elvashak | 07:59.53 | +47o 28.00’ | NQ2 | 1.32% | 28 |
Lyra | Lyr | Lyre (Harp) | Hercules | Ptolemy | Vega | 18:51.17 | +36o 41.36’ | NQ4 | 0.69% | 52 |
Ophiuchus | Oph | Serpent-Bearer | Hercules | Ptolemy | Rasalhague | 17:23.69 | ?07o 54.74’ | SQ3 | 2.30% | 11 |
Pegasus | Peg | Pegasus | Perseus | Ptolemy | Enif | 22:41.84 | +19o 27.98’ | NQ4 | 2.72% | 7 |
Perseus | Per | Perseus | Perseus | Ptolemy | Mirfak | 03:10.50 | +45o 00.79’ | NQ1 | 1.49% | 24 |
Sagitta | Sge | Arrow | Hercules | Ptolemy | g Sagittae | 00:26.28 | ?32o 05.30’ | SQ1 | 1.15% | 36 |
Scutum | Sct | Shield | Hercules | 1690, Hevelius | a Scuti | 10:16.29 | ?02o 36.88’ | SQ2 | 0.76% | 47 |
Serpens[9] | Ser | Serpent | Hercules | Ptolemy | Unukalhai | 19:39.05 | +18o 51.68’ | NQ4 | 0.19% | 86 |
Triangulum | Tri | Triangle | Perseus | Ptolemy | b Trianguli | 16:04.95 | ?65o 23.28’ | SQ3 | 0.27% | 83 |
Ursa Major | UMa | Big Dipper | Ursa Major | Ptolemy | Alioth | 11:18.76 | +50o 43.27’ | NQ2 | 3.10% | 3 |
Ursa Minor | UMi | Little Dipper | Ursa Major | Ptolemy | Polaris | 15:00.00 | +77o 41.99’ | NQ3 | 0.62% | 56 |
Vulpecula | Vul | Fox | Hercules | 1690, Hevelius | Anser | 20:13.88 | +24o 26.56’ | NQ4 | 0.65% | 55 |
Zodiacal Con. | IUA | Meaning | Family | Origin | Brightest Star | R.A. | Dec. | Quad. | %Sky | Rank |
Aquarius | Aqr | Water Bearer | Zodiac | Ptolemy | Sadalsuud | 19:40.02 | +03o 24.65’ | NQ4 | 1.58% | 22 |
Aries | Ari | Ram | Zodiac | Ptolemy | Hamal | 02:38.16 | +20o 47.54’ | NQ1 | 1.07% | 39 |
Cancer | Cnc | Crab | Zodiac | Ptolemy | Tarf | 21:02.93 | ?18o 01.39’ | SQ4 | 1.00% | 40 |
Capricornus | Cap | Goat (Seagoat) | Zodiac | Ptolemy | Deneb Algiedi | 02:32.64 | +71o 00.51’ | NQ4 | 1.42% | 27 |
Gemini | Gem | Twins | Zodiac | Ptolemy | Pollux | 07:04.24 | +22o 36.01’ | NQ2 | 1.25% | 30 |
Leo | Leo | Lion | Zodiac | Ptolemy | Regulus | 10:40.03 | +13o 08.32’ | NQ2 | 2.30% | 12 |
Libra | Lib | Scales | Zodiac | Ptolemy | Zubeneshamali | 10:14.72 | +32o 08.08’ | NQ2 | 0.56% | 64 |
Pisces | Psc | Fishes | Zodiac | Ptolemy | Alpherg | 22:17.07 | ?30o 38.53’ | SQ4 | 0.59% | 60 |
Sagittarius | Sgr | Archer | Zodiac | Ptolemy | Kaus Australis | 16:53.24 | ?27o 01.89’ | SQ3 | 1.20% | 33 |
Scorpius | Sco | Scorpion | Zodiac | Ptolemy | Antares | 18:40.39 | ?09o 53.32’ | SQ4 | 0.26% | 84 |
Taurus | Tau | Bull | Zodiac | Ptolemy | Aldebaran | 04:42.13 | +14o 52.63’ | NQ1 | 1.93% | 17 |
Virgo | Vir | Virgin | Zodiac | Ptolemy | Spica | 13:24.39 | ?04o 09.51’ | SQ3 | 3.14% | 2 |
Southern Constellations In The Western Tradition
Southern Con. | IUA | Meaning | Family | Origin | Brightest Star | R.A. | Dec. | Quad. | %Sky | Rank |
Antlia | Ant | Airpump | La Caille | 1763, Lacaille | a Antliae | 10:16.43 | ?32o 29.01’ | SQ2 | 0.58% | 62 |
Apus | Aps | Bird of Paradise | Bayer | 1603, Uranomet. | a Apodis | 16:08.65 | ?75o 18.00’ | SQ3 | 0.50% | 67 |
Ara | Ara | Altar | Hercules | Ptolemy | b Arae | 17:22.49 | ?56o 35.30’ | SQ3 | 0.57% | 63 |
Caelum | Cae | Sculptor's Tool | La Caille | 1763, Lacaille | a Caeli | 04:42.27 | ?37o 52.90’ | SQ1 | 0.30% | 81 |
Canis Major | CMa | Great Dog | Orion | Ptolemy | Sirius | 01:19.16 | +62o 11.04’ | NQ1 | 1.45% | 25 |
Canis Minor | CMi | Little Dog | Orion | Ptolemy | Procyon | 13:04.27 | ?47o 20.72’ | SQ3 | 2.57% | 9 |
Carina | Car | Keel (of Argo)1 | Heav. Wat. | 1763, Lacaille | Canopus | 01:40.10 | ?07o 10.76’ | SQ1 | 2.99% | 4 |
Centaurus | Cen | Centaur | Hercules | Ptolemy | Alpha Centauri | 14:34.54 | ?63o 01.82’ | SQ3 | 0.23% | 85 |
Cetus | Cet | Whale | Perseus | Ptolemy | Deneb Kaitos | 07:39.17 | +06o 25.63’ | NQ2 | 0.44% | 71 |
Chamaeleon | Cha | Chameleon | Bayer | 1603, Uranomet. | a Chamaeleontis | 08:38.96 | +19o 48.35’ | NQ2 | 1.23% | 31 |
Circinus | Cir | Compasses | La Caille | 1763, Lacaille | a Circini | 05:51.76 | ?35o 05.67’ | SQ1 | 0.65% | 54 |
Columba | Col | Dove | Heav. Wat. | 1592, Plancius | Phact | 12:47.27 | +23o 18.34’ | NQ3 | 0.94% | 42 |
Corona Australis | CrA | Southern Crown | Hercules | Ptolemy | Alphekka Meridiana | 15:50.59 | +32o 37.49’ | NQ3 | 0.43% | 73 |
Corvus | Crv | Crow (Raven) | Hercules | Ptolemy | Gienah | 12:26.99 | ?60o 11.19’ | SQ3 | 0.17% | 88 |
Crater | Crt | Cup | Hercules | Ptolemy | Labrum | 12:26.52 | ?18o 26.20’ | SQ3 | 0.45% | 70 |
Crux | Cru | Southern Cross | Hercules | 1603, Uranomet. | Acrux | 13:06.96 | +40o 06.11’ | NQ3 | 1.13% | 38 |
Dorado | Dor | Sword/Goldfish | Bayer | 1603, Uranomet. | a Doradus | 05:14.51 | ?59o 23.22’ | SQ1 | 0.43% | 72 |
Eridanus | Eri | Eridanus (river) | Heav. Wat. | Ptolemy | Achernar | 03:18.02 | ?28o 45.37’ | SQ1 | 2.76% | 6 |
Fornax | For | Furnace | La Caille | 1763, Lacaille | Fornacis | 02:47.88 | ?31o 38.07’ | SQ1 | 0.96% | 41 |
Grus | Gru | Crane | Bayer | 1603, Uranomet. | Alnair | 22:27.39 | ?46o 21.11’ | SQ4 | 0.89% | 45 |
Horologium | Hor | Clock | La Caille | 1763, Lacaille | a Horologii | 03:16.56 | ?53o 20.18’ | SQ1 | 0.60% | 58 |
Hydrus | Hyi | Water Snake | Bayer | 1603, Uranomet. | b Hydri | 02:20.65 | ?69o 57.39’ | SQ1 | 0.59% | 61 |
Indus | Ind | Indian | Bayer | 1603, Uranomet. | The Persian | 21:58.33 | ?59o 42.40’ | SQ4 | 0.71% | 49 |
Lepus | Lep | Hare | Orion | Ptolemy | Arneb | 15:11.96 | ?15o 14.08’ | SQ3 | 1.30% | 29 |
Lupus | Lup | Wolf | Hercules | Ptolemy | Men | 15:13.21 | ?42o 42.53’ | SQ3 | 0.81% | 46 |
Mensa | Men | Table/mountain | La Caille | 1763, Lacaille | a Mensae | 05:24.90 | ?77o 30.24’ | SQ1 | 0.37% | 75 |
Microscopium | Mic | Microscope | La Caille | 1763, Lacaille | g Microscopii | 20:57.88 | ?36o 16.49’ | SQ4 | 0.51% | 66 |
Monoceros | Mon | Unicorn | Orion | 1613, Plancius | b Monocerotis | 07:03.63 | +00o 16.93’ | NQ2 | 1.17% | 35 |
Musca | Mus | Southern Fly | Bayer | 1603, Uranomet. | a Muscae | 12:35.28 | ?70o 09.66’ | SQ3 | 0.34% | 77 |
Norma | Nor | Straightedge | La Caille | 1763, Lacaille | g2 Normae | 15:54.18 | ?51o 21.09’ | SQ3 | 0.40% | 74 |
Octans | Oct | Octant | La Caille | 1763, Lacaille | nu Oct | 23:00.00 | ?82o 09.12’ | SQ4 | 0.71% | 50 |
Orion | Ori | Orion | Orion | Ptolemy | Rigel | 05:34.59 | +05o 56.94’ | NQ1 | 1.44% | 26 |
Pavo | Pav | Peacock | Bayer | 1603, Uranomet. | Peacock | 19:36.71 | ?65o 46.89’ | SQ4 | 0.92% | 44 |
Phoenix | Phe | Phoenix | Bayer | 1603, Uranomet. | Ankaa | 00:55.91 | ?48o 34.84’ | SQ1 | 1.14% | 37 |
Pictor | Pic | Painter (Easel) | La Caille | 1763, Lacaille | a Pictoris | 05:42.46 | ?53o 28.45’ | SQ1 | 0.60% | 59 |
Piscis Austrinus | PsA | Southern Fish | Heav. Wat. | Ptolemy | Fomalhaut | 00:28.97 | +13o 41.23’ | NQ1 | 2.16% | 14 |
Puppis | Pup | Poop (of Argo) | Heav. Wat. | 1763, Lacaille | Naos | 07:15.48 | ?31o 10.64’ | SQ2 | 1.63% | 20 |
Pyxis | Pyx | Mariner Compass | Heav. Wat. | 1763, Lacaille | a Pyxidis | 08:57.16 | ?27o 21.10’ | SQ2 | 0.54% | 65 |
Reticulum | Ret | Net | La Caille | 1763, Lacaille | a Reticuli | 03:55.27 | ?59o 59.85’ | SQ1 | 0.28% | 82 |
Sculptor | Scl | Sculptor | La Caille | 1763, Lacaille | a Sculptoris | 16:57.04 | +06o 07.32’ | NQ3 | 1.54% | 23 |
Sextans | Sex | Sextant | Hercules | 1690, Hevelius | a Sextantis | 19:05.94 | ?28o 28.61’ | SQ4 | 2.10% | 15 |
Telescopium | Tel | Telescope | La Caille | 1763, Lacaille | a Telescopii | 19:19.54 | ?51o 02.21’ | SQ4 | 0.61% | 57 |
Triang. Australe | TrA | South. Triangle | Hercules | 1603, Uranomet. | Atria | 02:11.07 | +31o 28.56’ | NQ1 | 0.32% | 78 |
Tucana | Tuc | Toucan | Bayer | 1603, Uranomet. | a Tucanae | 23:46.64 | ?65o 49.80’ | SQ4 | 0.71% | 48 |
Vela | Vel | Sail (of Argo) | Heav. Wat. | 1763, Lacaille | Regor | 09:34.64 | ?47o 10.03’ | SQ2 | 1.21% | 32 |
Volans | Vol | Flying Fish | Bayer | 1603, Uranomet. | b Volantis | 07:47.73 | ?69o 48.07’ | SQ2 | 0.34% | 76 |
Top (Exceptional) Asteroids
Top Asteroids | Diam. (km) | Dimensions | M. Dst. (AU) | Discovery | Discoverer | Class | Mass (1018 kg) | %MTot | Mag.Max |
1 Ceres* | 946±2 | 965×962×891 | 2.766 | 1 Jan 1801 | Piazzi, G. | G | 939.3 | 31% | 6.65 |
4 Vesta | 525.4±0.2 | 572.6×557.2×446.4 | 2.362 | 29 Mar 1807 | Olbers, H. W. | V | 259.076 | 8.60% | 5.20 |
2 Pallas | 512±3 | 550±4×516±3×476±3 | 2.773 | 28 Mar1802 | Olbers, H. W. | B | 201.0 | 6.70% | 6.49 |
10 Hygiea | 431±7 | 530×407×370 | 3.139 | 12 Apr 1849 | de Gasparis, A. | C | 86.7 | 2.90% | |
704 Interamnia | 326 | 350×304 | 3.062 | 2 Oct 2010 | Cerulli, V. | F | 58.1 | 1.90% | |
52 Europa | 315 | 380×330×250 | 3.095 | 4 Feb 1858 | Goldschmidt, H. | C | 38.8 | 1.30% | |
511 Davida | 289 | 357×294×231 | 3.168 | 30 May 2003 | Dugan, R. S. | C | 37.7 | 1.30% | |
87 Sylvia | 286 | 385×265×230 | 3.485 | 16 May 1866 | Pogson, N. R. | X | 33.0 | 1.10% | |
65 Cybele | 273 | 302×290×232 | 3.439 | 8 Mar 1861 | Tempel, E. W. | C | 31.8 | 1.10% | |
15 Eunomia | 268 | 357×255×212 | 2.643 | 29 Jul 1851 | de Gasparis, A. | S | 28.6 | 0.95% | 7.9 |
3 Juno | 258 | 320×267×200 | 2.672 | 1 Sep 1804 | Harding, K. L. | S | 22.7 | 0.76% | 7.5 |
31 Euphrosyne | 256 | 3.149 | 1 Sep 1854 | Ferguson, J. | C | 22.7 | 0.76% | ||
624 Hektor | 241 | 370×195(×195) | 5.235 | 10 Feb 2007 | Kopff, A. | D | 18.3 | 0.61% | |
88 Thisbe | 232 | 221×201×168 | 2.769 | 15 Jun 1866 | Peters, C. H. F. | B | 16.2 | 0.54% | |
324 Bamberga | 229 | 2.684 | 25 Feb 1892 | Palisa, J. | C | 16.0 | 0.53% | 8.0 | |
451 Patientia | 225 | 3.059 | 4 Dec 1899 | Charlois, A. | 16.0 | 0.53% | |||
532 Herculina | 222 | 2.772 | 20 Apr 2004 | Wolf, M. | S | 15.2 | 0.51% | ||
48 Doris | 222 | 278×142 | 3.108 | 19 Sep 1857 | Goldschmidt, H. | C | 14.78 | 0.49% | |
375 Ursula | 216 | 3.126 | 18 Sep 1893 | Charlois, A. | 12.0 | 0.40% | |||
107 Camilla | 215 | 285×205×170 | 3.476 | 17 Nov 1868 | Pogson, N. R. | C | |||
45 Eugenia | 213 | 305×220×145 | 2.72 | 27 Jun 1857 | Goldschmidt, H. | F | |||
7 Iris | 213 | 240×200×200 | 2.386 | 13 Aug 1847 | Hind, J. R. | S | 6.73 | ||
29 Amphitrite | 212 | 233×212×193 | 2.554 | 1 Mar 1854 | Marth, A. | S | |||
423 Diotima | 209 | 171×138 | 3.065 | 7 Dec 1896 | Charlois, A. | C | |||
19 Fortuna | 208 | 225×205×195 | 2.442 | 22 Aug 1852 | Hind, J. R. | G | |||
13 Egeria | 206 | 217×196 | 2.576 | 2 Nov 1850 | de Gasparis, A. | G | |||
24 Themis | 198 | 3.136 | 5 Apr 1853 | de Gasparis, A. | C | ||||
94 Aurora | 197 | 225×173 | 3.16 | 6 Sep 1867 | Watson, J. C. | C | |||
702 Alauda | 195 | 3.195 | 16 Jul 2010 | Helffrich, J. | |||||
121 Hermione | 190 | 268×186×183 | 3.457 | 12 May 1872 | Watson, J. C. | C | |||
259 Aletheia | 190 | 3.135 | 28 Jun 1886 | Peters, C. H. F. | CP/X | ||||
372 Palma | 189 | 3.149 | 19 Aug 1893 | Charlois, A. | |||||
128 Nemesis | 188 | 2.751 | 25 Nov 1872 | Watson, J. C. | C | ||||
6 Hebe | 186 | 205×185×170 | 2.426 | 1 Jul 1847 | Hencke, K. L. | S | 7.5 | ||
16 Psyche | 186 | 240×185×145 | 2.924 | 17 Mar 1852 | de Gasparis, A. | M | |||
120 Lachesis | 174 | 3.301 | 10 Apr 1872 | Borrelly, A. | C | ||||
41 Daphne | 174 | 213×160 | 2.765 | 22 May 1856 | Goldschmidt, H. | C | |||
9 Metis | 174 | 222×182×130 | 2.385 | 25 Apr 1848 | Graham, A. | S | 8.1 |
50 Brightest Stars (And Sun)
Stars | Name | Constellation | Bayer ID | V.Mag. | A.Mag. | Dist.(ly) | Spect.Class | Lum.(Sol) | Mass(Sol) | Diam.(Sol) | R.A. | Dec. |
0 | Sun | n/a | n/a | -26.74 | 4.83 | 1.5×10-5 | G2V | 1.0 | 1.0 | 1.0 | 19:04 | +63° 54’ |
1 | Sirius | Canis Major | Alp CMa | -1.44 | 1.45 | 8.6 | A1V | 25 | 2.0 | 1.7 | 06:45 | -16° 42’ |
2 | Canopus | Carina | Alp Car | -0.62 | -5.53 | 310 | F0Ib | 13,600 | 8.5 | 65.0 | 06:24 | -52° 42’ |
3 | Rigil Kent. | Centaurus | Alp Cen | -0.28c | 4.34 | 4.4 | G2V+K1V | 1.5 | 1.1 | 1.2 | 14:40 | -60° 48’ |
4 | Arcturus | Bootes | Alp Boo | -0.05v | -0.31 | 36.7 | K2III | 170 | 1.1 | 26.0 | 14:16 | +19° 12’ |
5 | Vega | Lyra | Alp Lyr | 0.03v | 0.58 | 25.3 | A0V | 37 | 2.1 | 2.3 | 18:37 | +38° 48’ |
6 | Capella | Auriga | Alp Aur | 0.08v | -0.48 | 42.2 | G5III+G0II | 79 | 2.7 | 12.0 | 05:17 | +46° 00’ |
7 | Rigel | Orion | Bet Ori | 0.18v | -6.69 | 770 | B8Ia | 66,000 | 17.0 | 78.0 | 05:15 | -8° 12’ |
8 | Procyon | Canis Minor | Alp CMi | 0.4 | 2.68 | 11.4 | F5IV-V | 7.7 | 1.5 | 2.0 | 07:39 | +5° 12’ |
9 | Betelgeuse | Orion | Alp Ori | 0.45v | -5.14 | 430 | M2Ib | 105,000 | 18.0 | 936.0 | 05:55 | +7° 24’ |
10 | Achernar | Eridanus | Alp Eri | 0.45v | -2.77 | 144 | B3V | 3,300 | XXX | 10.0 | 01:38 | -57° 12’ |
11 | Hadar | Centaurus | Bet Cen | 0.61v | -5.42 | 525 | B1III | 16,000 | 10.7 | 8.0 | 14:04 | -60° 24’ |
12 | Altair | Aquila | Alp Aql | 0.76v | 2.20 | 16.8 | A7V | 10.6 | 1.8 | 1.8 | 19:51 | +8° 54’ |
13 | Acrux | Crux | Alp Cru | 0.77c | -4.19 | 320 | B0.5IV+B1V | 25,000 | 14 | ? | 12:27 | -63° 06’ |
14 | Aldebaran | Taurus | Alp Tau | 0.87 | -0.63 | 65.1 | K5III | 425 | 1.7 | 44.2 | 04:36 | +16° 30’ |
15 | Spica | Virgo | Alp Vir | 0.98v | -3.55 | 260 | B1V+B2V | 13,400 | 11.0 | 7.8 | 13:25 | -11° 12’ |
16 | Antares | Scorpius | Alp Sco | 1.06v | -5.28 | 605 | M1Ib+B4V | 65,000 | 15.5 | 800.0 | 16:29 | -26° 24’ |
17 | Pollux | Gemini | Bet Gem | 1.16 | 1.09 | 33.7 | K0III | 32 | 1.9 | 8.0 | 07:45 | +28° 00’ |
18 | Fomalhaut | Piscis Austrinus | Alp PsA | 1.17 | 1.74 | 25.1 | A3V | 17.7 | 2.1 | 1.8 | 22:58 | -29° 30’ |
19 | Deneb | Cygnus | Alp Cyg | 1.25v | -8.73 | 3200 | A2Ia | 54,000 | 20.0 | 110.0 | 20:41 | +45° 18’ |
20 | Mimosa | Crux | Bet Cru | 1.25v | -3.92 | 350 | B0.5III | 34,000 | 14.0 | 8.0 | 12:48 | -59° 42’ |
21 | Regulus | Leo | Alp Leo | 1.36 | -0.52 | 77.5 | B7V | 150 | 3.5 | 3.2 | 10:08 | +12° 00’ |
22 | Adhara | Canis Major | Eps CMa | 1.5 | -4.10 | 430 | B2II | 20,000 | 10.0 | ? | 06:59 | -29° 00’ |
23 | Castor | Gemini | Alp Gem | 1.58c | 0.59 | 51.5 | A1V+A2V | 30/14 | 2.2/1.7 | 2.3/1.6 | 07:35 | +31° 54’ |
24 | Gacrux | Crux | Gam Cru | 1.59v | -0.56 | 87.9 | M3.5III | 1,500 | 3.0 | 113.0 | 12:31 | -57° 06’ |
25 | Shaula | Scorpius | Lam Sco | 1.62v | -5.05 | 700 | B2IV | ? | 10.4 | 6.2 | 17:34 | -37° 06’ |
26 | Bellatrix | Orion | Gam Ori | 1.64 | -2.72 | 240 | B2III | 21,500 | 8.0 | 5.7 | 05:25 | +6° 18’ |
27 | Elnath | Taurus | Bet Tau | 1.65 | -1.37 | 131 | B7III | 70 | 4.5 | 5.5 | 05:26 | +28° 36’ |
28 | Miaplacidus | Carina | Bet Car | 1.67 | -0.99 | 111 | A2III | 210 | 3.0 | 5.7 | 09:13 | -69° 42’ |
29 | Alnilam | Orion | Eps Ori | 1.69v | -6.38 | 1300 | B0Ia | 375,000 | 40.0 | 26.0 | 05:36 | -1° 12’ |
30 | Alnair | Grus | Alp Gru | 1.73 | -0.73 | 101 | B7IV | 380 | 4.0 | 3.6 | 22:08 | -47° 00’ |
31 | Alnitak | Orion | Zet Ori | 1.74c | -5.26 | 820 | O9.5Ib+B0I | 100,000 | 28.0 | 20.0 | 05:41 | -1° 54’ |
32 | Regor | Vela | Gam Vel | 1.75v | -5.31 | 840 | WC8+O9Ib | 100,000 | 30.0 | 13.0 | 08:10 | -47° 18’ |
33 | Alioth | Ursa Major | Eps UMa | 1.76v | -0.21 | 80.9 | A0IV | 108 | 3.0 | 3.7 | 12:54 | +56° 00’ |
34 | Kaus Aust. | Sagittarius | Eps Sgr | 1.79 | -1.44 | 145 | B9.5III | 375 | 5.0 | 7.0 | 18:24 | -34° 24’ |
35 | Mirfak | Perseus | Alp Per | 1.79 | -4.50 | 590 | F5Ib | 5,400 | 11.0 | 56.0 | 03:24 | +49° 54’ |
36 | Dubhe | Ursa Major | Alp UMa | 1.81 | -1.08 | 124 | K0III+F0V | 300 | 4.0 | 30.0 | 11:04 | +61° 48’ |
37 | Wezen | Canis Major | Del CMa | 1.83 | -6.87 | 1800 | F8Ia | 50,000 | 17.0 | 200.0 | 07:08 | -26° 24’ |
38 | Alkaid | Ursa Major | Eta UMa | 1.85 | -0.60 | 101 | B3V | 700 | 6.0 | 1.8 | 13:48 | +49° 18’ |
39 | Sargas | Scorpius | The Sco | 1.86c | -2.75 | 270 | F1II | 960 | 3.7 | 20.0 | 17:37 | -43° 00’ |
40 | Avior | Carina | Eps Car | 1.86v | -4.58 | 630 | K3II+B2V | 6/11 K | 4.6/16 | 153.0/6.0 | 08:23 | -59° 30’ |
41 | Menkalinan | Auriga | Bet Aur | 1.90v | -0.10 | 82.1 | A2IV | 48 | 2.4 | 2.8 | 06:00 | +44° 54’ |
42 | Atria | Triang.Australe | Alp TrA | 1.91 | -3.62 | 415 | K2Ib-II | 5,500 | 7.0 | ? | 16:49 | -69° 00’ |
43 | Koo She | Vela | Del Vel | 1.93 | -0.01 | 79.7 | A0V | ? | ? | ? | 08:45 | -54° 42’ |
44 | Alhena | Gemini | Gam_Gem | 1.93 | -0.60 | 105 | A0IV | 160 | 2.8 | 4.4 | 06:38 | +16° 24’ |
45 | Peacock | Pavo | Alp Pav | 1.94 | -1.81 | 180 | B0.5V+B2V | 2,100 | 5.0 | 4.4 | 20:26 | -56° 42’ |
46 | Polaris | Ursa Minor | Alp UMi | 1.97v | -3.64 | 430 | F7Ib-II | 2,200 | 7.5 | 30.0 | 02:32 | +89° 18’ |
47 | Mirzam | Canis Major | Bet CMa | 1.98v | -3.95 | 500 | B1III | 19,000 | ? | ? | 06:23 | -18° 00’ |
48 | Alphard | Hydra | Alp Hya | 1.99 | -1.69 | 180 | K3II | ? | 3.0 | 50.5 | 09:28 | -8° 42’ |
49 | Algieba | Leo | Gam Leo | 2.01 | -0.92 | 126 | K0III+G7II | 320/50 | 1.23 | 32.0 | 10:20 | +19° 48’ |
50 | Hamal | Aries | Alp Ari | 2.01 | 0.48 | 65.9 | K2III | 90 | 2.0 | 15.0 | 02:07 | +23° 30’ |
Class | Effect. Temp. | Vega-Rel Color Label | Chromaticity | Main-Seq. Mass | Main-Seq. Radius | Main-Seq. Luminosity | H Lines | FAMSS |
O | ? 30k K | blue | blue | > 16 M(Sol) | > 6.6 R(Sol) | > 30,000 L(Sol) | Weak | ~0.00003% |
B | 10k–30k K | blue white | deep blue white | 2.1–16 M(Sol) | 1.8–6.6 R(Sol) | 25–30,000 L(Sol) | Medium | 0.13% |
A | 7.5k–10k K | white | blue white | 1.4–2.1 M(Sol) | 1.4–1.8 R(Sol) | 5–25 L(Sol) | Strong | 0.60% |
F | 6k–7.5k K | yellow white | white | 1.04–1.4 M(Sol) | 1.15–1.4 R(Sol) | 1.5–5 L(Sol) | Medium | 3% |
G | 5.2k–6k K | yellow | yellowish white | 0.8–1.04 M(Sol) | 0.96–1.15 R(Sol) | 0.6–1.5 L(Sol) | Weak | 7.60% |
K | 3.7k–5.2k K | orange | pale yellow orange | 0.45–0.8 M(Sol) | 0.7–0.96 R(Sol) | 0.08–0.6 L(Sol) | Very weak | 12.10% |
M | 2,400–3,700 K | red | light orange red | 0.08-0.45 M(Sol) | < 0.7 R(Sol) | < 0.08 L(Sol) | Very weak | 76.45% |