Astronomy:B1 Hydrae
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Short description: Main-sequence star
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Hydra[1] |
| Right ascension | 10h 46m 52.05s[2] |
| Declination | −17° 17′ 48.7″[2] |
| Apparent magnitude (V) | 5.42[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A3V[3] |
| U−B color index | +0.14[3] |
| B−V color index | +0.11[3] |
| R−I color index | +0.04[3] |
| Astrometry | |
| Radial velocity (Rv) | +0.23±0.99[2] km/s |
| Proper motion (μ) | RA: −15.864[2] mas/yr Dec.: −18.786[2] mas/yr |
| Parallax (π) | 17.7995 ± 0.1794[2] mas |
| Distance | 183 ± 2 ly (56.2 ± 0.6 pc) |
| Absolute magnitude (MV) | +1.45[5] |
| Details | |
| Mass | 2.09[6] M☉ |
| Radius | 1.94[6] R☉ |
| Luminosity | 17.2[6] L☉ |
| Surface gravity (log g) | 4.18[6] cgs |
| Temperature | 8,433[6] K |
| Rotational velocity (v sin i) | 96[4] km/s |
| Age | 652[7] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
b1 Hydrae is a main-sequence star in the constellation of Hydra with an apparent magnitude of 5.42.
References
- ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific 99 (617): 695. doi:10.1086/132034. Bibcode: 1987PASP...99..695R Constellation record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 "VizieR Detailed Page". http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=5050&-corr=PK=HR&-out.max=9999&HR=4214. Retrieved 2012-07-13.
- ↑ 4.0 4.1 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.
- ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 6.0 6.1 6.2 6.3 6.4 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters 38 (12): 771. doi:10.1134/S1063773712120031. Bibcode: 2012AstL...38..771G.
- ↑ "3 Crt". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=3+Crt.
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