B1 Hydrae

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Wikipedia

b1 Hydrae
Observation data
Epoch J2000.0      Equinox J2000.0
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 mas[2]
Distance183 ± 2 ly
(56.2 ± 0.6 pc)
Absolute magnitude (MV)+1.45[5]
Details
Mass2.09[6] M☉
Radius1.94[6] R☉
Luminosity17.2[6] L☉
Surface gravity (log g)4.18[6] cgs
Temperature8,433[6] K
Rotational velocity (v sin i)96[4] km/s
Age652[7] Myr
Other designations
3 Crt, BD−16°3124, HD 93397, HR 4214, SAO 156221[8]
Database references
SIMBADdata

b1 Hydrae is a main-sequence star in the constellation of Hydra with an apparent magnitude of 5.42.

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 5 "VizieR Detailed Page". Archived from the original on 2016-03-05. Retrieved 2012-07-13.
  4. 1 2 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691.
  5. ↑ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  6. 1 2 3 4 5 Stassun, Keivan G.; et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467.
  7. ↑ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv:1606.08814. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031.
  8. ↑ "3 Crt". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-11-13.