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Gemini (abbr. Gem, gen. Geminorum)
The Twins: Pollux fathered by Zeus and divine, Castor mortal, both placed in the sky to allow them to be together for all time. Gemini is a prominent constellation of the northern hemisphere and the third (and northernmost) of the zodiac. It lies south and east of Auriga, west of Cancer, and north and east of Orion. See below for details of the constellation's brightest stars and interesting deep sky objects.
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| Gemini. © 2003 Torsten Bronger. Copied here under the terms of the GNU Free Documentation License |
| Stars brighter than magnitude 4.0 | ||||||
|---|---|---|---|---|---|---|
| Star | Visual mag. |
Abs. mag. |
Spectral type |
Distance (lt-yr) |
R.A. (h m s) | Dec. ( ° ' '' ) |
| Beta (Pollux) | 1.16 | 1.08 | K0IIIb | 34 | 07 45 19 | +28 01 34 |
| Alpha (Castor) | 1.58 | 0.58 | A2Vm+A1V | 52 | 07 34 36 | +31 53 18 |
| Gamma (Alhena) | 1.93 | -0.61 | A0IV | 105 | 06 37 43 | +16 23 57 |
| Mu (Tejat Posterior) | 2.87 | -1.39 | M3IIIab | 232 | 06 22 58 | +23 30 49 |
| Epsilon (Mebsuta) | 3.06 | -4.15 | G8Ib | 904 | 06 43 56 | +25 07 52 |
| Eta (Tejat Prior) | 3.31 | -1.84 | M3IIIab | 349 | 06 22 58 | +22 30 49 |
| Xi (Alzirr) | 3.35 | 2.13 | F5IV | 57 | 06 45 17 | +12 53 44 |
| Delta (Wasat) | 3.50 | 2.22 | F0IV | 59 | 07 20 07 | +21 58 56 |
| Kappa | 3.57 | 0.35 | G8IIIa | 144 | 07 44 27 | +24 23 52 |
| Lambda | 3.58 | 1.27 | A3V | 94 | 07 18 06 | +16 32 25 |
| Theta | 3.60 | -0.30 | A3III | 197 | 06 52 47 | +33 57 40 |
| Zeta (Mekbuta) | 4.01v | -3.77 | F7-G3Ib | 1,170 | 07 04 07 | +20 34 13 |
| Iota | 3.78 | 0.84 | G9IIIb | 126 | 07 25 44 | +27 47 53 |
| Other objects of interest | ||
|---|---|---|
| Name | Type of Object | Notes |
| Zeta Gem | star | One of the brightest Cepheid variables. Magnitude range 3.7 to 4.1; period 10.15 days |
| U Gem | star | The prototype U Geminorum star |
| M35 (NGC 2168) | open cluster | An outstanding cluster of about 200 stars, visible as a hazy patch with binoculars or a small telescope. Magnitude 5; diameter 28'; R.A. 06h 08.9m, Dec. +24° 20' |
| Eskimo Nebula | planetary nebula | NGC 2392. See separate entry |
| Constellations |
| Andromeda | Antlia | Apus | Aquarius | Aquila | Ara | Aries | Auriga | Bootes | Caelum | Camelopardalis | Cancer | Canes Venatici | Canis Major | Canis Minor | Capricornus | Carina | Cassiopeia | Centaurus | Cepheus | Cetus | Chamaeleon | Circinus | Columba | Coma Berenices | Corona Austrina | Corona Borealis | Corvus | Crater | Crux | Cygnus | Delphinus | Dorado | Draco | Equuleus | Eridanus | Fornax | Gemini | Grus | Hercules | Horologium | Hydra | Hydrus | Indus | Lacerta | Leo | Leo Minor | Lepus | Libra | Lupus | Lynx | Lyra | Mensa | Microscopium | Monoceros | Musca | Norma | Octans | Ophiuchus | Orion | Pavo | Pegasus | Perseus | Phoenix | Pictor | Pisces | Piscis Austrinus | Puppis | Pyxis | Reticulum | Sagitta | Sagittarius | Scorpius | Sculptor | Scutum | Serpens | Sextans | Taurus | Telescopium | Triangulum | Triangulum Australe | Tucana | Ursa Major | Ursa Minor | Vela | Virgo | Volans | Vulpecula |
Related categories
• NOTABLE STARS
• NEBULAE AND STAR CLUSTERS
• GALAXIES
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