NGC 2129
| NGC 2129 | |
|---|---|
| Observation data (J2000 epoch) | |
| Constellation | Gemini |
| Right ascension | 06h 01m 06.5s[1][2] |
| Declination | +23° 10′ 20″[1][2] |
| Distance | 7,200 ly (2,200 pc[3]) |
| Apparent magnitude (V) | 6.7 [2] |
| Apparent dimensions (V) | 2.5 MOA[3] |
| Physical characteristics | |
| Radius | 5.2 |
| Estimated age | 10 Myr |
| Other designations | NGC 2129, C 0558+233, OCl 467, OCISM 10, KPR2004b 84.[2] |
Coordinates: 
06h 01m 06.00s, +23° 19′ 00″
NGC 2129 is an open cluster in the constellation Gemini. It has an angular distance of 2.5 arcminutes and is approximately 2.2 ± 0.2 kpc (~7,200 light years) from the Sun inside the Local spiral arm.[3] At that distance, the angular size of the cluster corresponds to a diameter of about 10.4 light years. NGC 2129 is a very young cluster whose age has been estimated at 10 million years.[3]
The group is dominated by two close B-Type stars, HD 250289 (B2III) and HD 250290 (B3I). With the two stars sharing the same proper motion and radial velocity it is likely that the two constitute a binary system.[3]
See also
- List of Messier objects
- List of NGC objects
- List of open clusters
- General Catalogue of Nebulae and Clusters
References
- 1 2 "NED results for object NGC 2129". NASA/IPAC Extragalactic Database. Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Retrieved 2010-06-30.
- 1 2 3 4 "NGC 2355 -- Open (galactic) Cluster". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 2010-06-30.
- 1 2 3 4 5 Carraro, Giovanni; Chaboyer, Brian; Perencevich, James (January 2006). "The young open cluster NGC 2129". Royal Astronomical Society 365 (8): 867–873. arXiv:astro-ph/0510573. Bibcode:2006MNRAS.365..867C. doi:10.1111/j.1365-2966.2005.09762.x.
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External links
- NASA/IPAC Extragalactic Database (NED): NGC 2129
- NGC 2129 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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