NGC 2158
| NGC 2158 | |
|---|---|
| Observation data (J2000 epoch) | |
| Right ascension | 06h 07m 25s |
| Declination | +24° 05.8′ |
| Distance | 11,000+ ly (3600±400 pc) |
| Apparent magnitude (V) | 8.6 |
| Apparent dimensions (V) | 5 arcmin |
| Physical characteristics | |
| Mass | 3067 ±69.84 M☉ |
| Radius | 8 ly |
| Estimated age | ~2 billion yrs |
| Other designations | OCL 468, Lund 206, Melotte 40 |
| Associations | |
| Constellation | Gemini |
| Galaxy | Milky Way |
NGC 2158, also known as OCL 468, Lund 206 or Melotte 40, it is an open cluster of stars located around 11,000 light years (3600 ±400 pc) from Earth in the constellation of Gemini. It is of intermediate age being around 2 billion years old. The cluster is populous with stars containing some 3000 ±69 stars within a radius of about 8 light years.
It is, in angle, immediately southwest of open cluster Messier 35. The two clusters are unrelated, as the subject is around 9,000 light years further away.