| NGC 2129 | |
|---|---|
.jpg) SDSS image of NGC 2129 | |
| Observation data (J2000 epoch) | |
| 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] |
| Associations | |
| Constellation | Gemini |
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]
- ^ a b "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.
- ^ a b c d "NGC 2129". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-06-30.
- ^ a b c d e 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. arXiv:astro-ph/0510573. Bibcode:2006MNRAS.365..867C. doi:10.1111/j.1365-2966.2005.09762.x. S2CID 15621721.