HD 2767
(Redirected from HR 122)
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 31m 25.6379s[1] |
| Declination | +33° 34′ 53.8934″[1] |
| Apparent magnitude (V) | 5.88[2] |
| Characteristics | |
| Spectral type | K1III + F8[2] |
| B−V color index | 1.13[2] |
| Astrometry | |
| Radial velocity (Rv) | 3.398±0.114[2] km/s |
| Proper motion (μ) | RA: 50.761±0.138[1] mas/yr Dec.: −10.813±0.166[1] mas/yr |
| Parallax (π) | 8.6835 ± 0.1026 mas[1] |
| Distance | 376 ± 4 ly (115 ± 1 pc) |
| Details | |
| Luminosity | 70.21[3] L☉ |
| Temperature | 4,781[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 2767 is the primary component of a double star located 115 parsecs (380 ly) away in the constellation Andromeda. It is a red giant with a spectral type of K1III and an apparent magnitude of 5.88, thus is visible by the naked eye under favourable conditions.[2]
The secondary is named BD+32 81, has an apparent magnitude of 9.28, and is an F-type star; it shares radial velocity, parallax and proper motion with the primary component. The distance from the primary is estimated as 6,536 AU,[2] while their separation in the sky is 56 arcseconds.[4]
References
[edit]- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d e f Halbwachs, J. -L; Mayor, M.; Udry, S. (2017). "Double stars with wide separations in the AGK3 - II. The wide binaries and the multiple systems". Monthly Notices of the Royal Astronomical Society. 464 (4): 4966. arXiv:1610.04423. Bibcode:2017MNRAS.464.4966H. doi:10.1093/mnras/stw2683. S2CID 119181622.
- ^ a b McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
- ^ "BDS+258". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved December 4, 2018.
External links
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