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 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Gemini |
| 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] |
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]
References
- "SIMBAD Astronomical Database". Results for NGC 2158. Retrieved 2010-08-31.
- Carraro, Giovanni; Girardi, Leo; Marigo, Paola (2002). "The intermediate-age open cluster NGC 2158". Monthly Notices of the Royal Astronomical Society. 332 (3): 705. arXiv:astro-ph/0202018. Bibcode:2002MNRAS.332..705C. doi:10.1046/j.1365-8711.2002.05326.x.
External links
Media related to NGC 2158 at Wikimedia Commons- NGC 2158 (SEDS)
- NGC 2158 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NASA Astronomy Picture of the Day: Open Star Clusters M35 and NGC 2158 (2003 December 15)
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