Astronomy:NGC 2129
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Short description: Open cluster in the constellation Gemini
| NGC 2129 | |
|---|---|
.jpg) SDSS image of 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
- ↑ 1.0 1.1 "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. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+2129&extend=no&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 2.0 2.1 2.2 2.3 "NGC 2355". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+2355.
- ↑ 3.0 3.1 3.2 3.3 3.4 Carraro, Giovanni; Chaboyer, Brian; Perencevich, James (January 2006). "The young open cluster NGC 2129". Monthly Notices of the Royal Astronomical Society 365 (8): 867–873. doi:10.1111/j.1365-2966.2005.09762.x. Bibcode: 2006MNRAS.365..867C.
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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