B3 Hydrae

b3 Hydrae
Observation data
Epoch J2000.0      Equinox ICRS
Constellation Hydra
Right ascension 10h 53m 29.532s
Declination −20° 08′ 19.43″
Apparent magnitude (V) 5.24
Characteristics
Evolutionary stage main sequence
Spectral type F5V
U−B color index +0.06
B−V color index +0.47
Astrometry
Radial velocity (Rv)−4.08±0.12 km/s
Proper motion (μ) RA: +80.915 mas/yr
Dec.: −238.566 mas/yr
Parallax (π)33.2327±0.1234 mas
Distance98.1 ± 0.4 ly
(30.1 ± 0.1 pc)
Absolute magnitude (MV)+2.79
Details
Mass1.48 M☉
Radius1.93 R☉
Luminosity6.02 L☉
Surface gravity (log g)3.99 cgs
Temperature6,505 K
Metallicity [Fe/H]+0.09 dex
Rotation27.1 days
Rotational velocity (v sin i)6.0 km/s
Age2.27 Gyr
Other designations
b3 Hya, 6 Crt, HD 94388, HIP 53252, HR 4521, SAO 156301, PPM 258261, CCDM J10534-2009A, WDS J10535-2008A
Database references
SIMBADdata

b3 Hydrae (6 Crateris) is a star in the constellation Hydra at a distance of approximately 98 light-years (about 30 parsecs) from the Sun. It has three optical companions, which are background stars located much farther away.

Description

b3 Hydrae (WDS J10535-2008A) is a yellow-white main sequence star with the spectral type of F5V. The apparent magnitude of the star is +5.232. It has about 1.5 M☉, its radius is about 1.9 R☉ and the luminosity is about 6.0 L☉. The age of the star is determined to be about 1.647 billion years. The effective temperature is about 6,505 K.

Optical companions

BD−19 3124

The secondary (BD−19 3124) is a yellow main sequence star of spectral type G5. The apparent magnitude of the star is +9.6. The mass is about 1.492 ± 0.001 M☉, the radius is about 2.071 ± 0.008 R☉, the luminosity is about 6.946 ± 0.001 L☉. The effective temperature is about 6,566±1 K. It is 119.6 arcseconds away from b3 Hydrae and about 774 light-years (237 parsecs) away from the Solar System.

UCAC2 23866861

The third component (UCAC2 23866861) is a yellow dwarf of spectral type G.[citation needed] The apparent magnitude of the star is +11.6. The mass is about 0.989 ± 0.001 M☉, the radius is about 1.315 ± 0.002 R☉, the luminosity is about 1.662 ± 0.001 L☉. The effective temperature is about 5,761±4 K. It is separated from BD−19 3124 by 13.7 arc seconds and is about 850 light-years (260 parsecs) away from the Solar System.

UCAC2 23866855

The fourth component (UCAC2 23866855) is a yellow-white star of spectral type F.[citation needed] The apparent magnitude of the star is +13.5. The mass is about 1.332 ± 0.001 M☉ the radius is about 1.829 ± 0.005 R☉ the luminosity is about 4.356 ± 0.001 L☉ the effective temperature is about 6,236±1 K. It is located 40.5 arc seconds away from BD−19 3124 and is about 3,820 light-years (1,170 parsecs) away from the Solar System.

References

  1. 1 2 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.
  2. 1 2 3 4 5 6 7 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 "VizieR Detailed Page". Archived from the original on 2016-03-04. Retrieved 2012-07-13.
  4. 1 2 3 4 Aguilera-Gómez, Claudia; Ramírez, Iván; Chanamé, Julio (2018). "Lithium abundance patterns of late-F stars: An in-depth analysis of the lithium desert". Astronomy and Astrophysics. 614: A55. arXiv:1803.05922. Bibcode:2018A&A...614A..55A. doi:10.1051/0004-6361/201732209.
  5. 1 2 3 4 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.
  6. ↑ Oelkers, Ryan J.; Rodriguez, Joseph E.; Stassun, Keivan G.; Pepper, Joshua; Somers, Garrett; Kafka, Stella; Stevens, Daniel J.; Beatty, Thomas G.; Siverd, Robert J.; Lund, Michael B.; Kuhn, Rudolf B.; James, David; Gaudi, B. Scott (2018). "Variability Properties of Four Million Sources in the TESS Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey". The Astronomical Journal. 155 (1): 39. arXiv:1711.03608. Bibcode:2018AJ....155...39O. doi:10.3847/1538-3881/aa9bf4.
  7. ↑ Reiners, A.; Schmitt, J. H. M. M. (2003). "Rotation and differential rotation in field F- and G-type stars". Astronomy and Astrophysics. 398 (2): 647. Bibcode:2003A&A...398..647R. doi:10.1051/0004-6361:20021642.
  8. ↑ "6 Crateris". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-09-14.
  9. ↑ Maíz Apellániz, J.; Holgado, G.; Pantaleoni González, M.; Caballero, J. A. (2023). "Stellar variability in Gaia DR3. I. Three-band photometric dispersions for 145 million sources". Astronomy and Astrophysics. 677: A137. arXiv:2304.14249. Bibcode:2023A&A...677A.137M. doi:10.1051/0004-6361/202346759.
  10. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
  11. 1 2 3 4 5 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.
  12. 1 2 3 Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
  13. ↑ Nascimbeni, V.; Piotto, G.; Ortolani, S.; Giuffrida, G.; Marrese, P. M.; Magrin, D.; Ragazzoni, R.; Pagano, I.; Rauer, H.; Cabrera, J.; Pollacco, D.; Heras, A. M.; Deleuil, M.; Gizon, L.; Granata, V. (2016). "An all-sky catalogue of solar-type dwarfs for exoplanetary transit surveys". Monthly Notices of the Royal Astronomical Society. 463 (4): 4210. arXiv:1609.03037. Bibcode:2016MNRAS.463.4210N. doi:10.1093/mnras/stw2313.
  14. 1 2 3 4 5 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.
  15. ↑ Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2012). "VizieR Online Data Catalog: UCAC4 Catalogue (Zacharias+, 2012)". Vizier Online Data Catalog. Bibcode:2012yCat.1322....0Z.
  16. 1 2 3 4 5 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.