NGC 2158

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

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.

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

^ ^a ^b ^c "SIMBAD Astronomical Database". Results for NGC 2158. Retrieved 2010-08-31.
^ ^a ^b ^c ^d ^e 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.{{cite journal}}: CS1 maint: unflagged free DOI (link)

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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[simbad-1] "SIMBAD Astronomical Database". Results for NGC 2158. Retrieved 2010-08-31.

[Carraro-2] 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.{{cite journal}}: CS1 maint: unflagged free DOI (link)

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