Gemini

Gemini (abbreviation: Gem)is the constellation of the Twins: Pollux fathered by Zeus and divine,and Castor mortal, both placed in the sky to allow them to be together for all time. It is a prominent constellation of the northern hemisphere and the third (and northernmost) of the zodiac. Gemini 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.

Stars brighter than magnitude 4.0
star	vis mag	abs mag	spec type	distance (ly)	RA (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'; RA 06h 08.9m, Dec +24° 20'
Eskimo Nebula	planetary nebula	NGC 2392. See separate entry