HD 2942
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 32m 49.087s[1] |
| Declination | +28° 16′ 48.86″[1] |
| Apparent magnitude (V) | 6.283 |
| Characteristics | |
| Spectral type | K0III[2] |
| U−B color index | 0.80[2] |
| B−V color index | 0.99[2] |
| Astrometry | |
| Radial velocity (Rv) | -11.16[2] km/s |
| Proper motion (μ) | RA: -4.41 ± 0.61[1] mas/yr Dec.: 5.80 ± 0.39[1] mas/yr |
| Parallax (π) | 6.31 ± 0.54[1] mas |
| Distance | 520 ± 40 ly (160 ± 10 pc) |
| Absolute magnitude (MV) | 7.235 |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
HD 2942 is a triple star system[3] in the constellation Andromeda located approximately 158 parsecs (520 ly) away. The primary component, a red giant of spectral type K0III, has an apparent magnitude of 6.33, meaning that it is barely visible with the naked eye under good conditions.[2] The secondary and tertiary components have apparent magnitudes of 11.26[4] and 12.3,[5] respectively.
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- 1 2 3 4 5 "HR 134". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 February 2014.
- ↑ Tokovinin, A. (2008). "Comparative statistics and origin of triple and quadruple stars". Monthly Notices of the Royal Astronomical Society 389 (2): 925. doi:10.1111/j.1365-2966.2008.13613.x.
- ↑ "BD+27 84B". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 February 2014.
- ↑ "BD+27 84C". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 February 2014.
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