NGC 2158

NGC 2158 is an open cluster in the constellation of Gemini. It is, in angle, immediately southwest of open cluster Messier 35, and is believed to be about 2 billion years old.^[2] The two clusters are unrelated, as the subject is around 9,000 light years further away.

NGC 2158
NGC 2158 to the lower right of M35 Credit: 2MASS/NASA
Observation data (J2000 epoch)
Right ascension	06h 07m 25s[1]
Declination	+24° 05.8′[1]
Distance	11,000+ ly[2]
Apparent magnitude (V)	8.6[1]
Apparent dimensions (V)	5 arcmin[2]
Physical characteristics
Radius	8 ly
Estimated age	~2 billion yrs[2]
Associations
Constellation	Gemini
See also: Open cluster, List of open clusters

Once thought to be a globular cluster, it is now known to be an intermediate-age, metal-poor open cluster that is a member of the old thin disk population.^[2]

Additional Images