B3 Hydrae

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For other stars with this Bayer designation, see b Hydrae.
b3 Hydrae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Hydra[1]
Right ascension 10h 53m 29.532s[2]
Declination −20° 08′ 19.43″[2]
Apparent magnitude (V) 5.24[3]
Characteristics
Evolutionary stage main sequence[2]
Spectral type F5V[3]
U−B color index +0.06[3]
B−V color index +0.47[3]
Astrometry
Radial velocity (Rv)−4.08±0.12[2] km/s
Proper motion (μ) RA: +80.915[2] mas/yr
Dec.: −238.566[2] mas/yr
Parallax (π)33.2327±0.1234 mas[2]
Distance98.1 ± 0.4 ly
(30.1 ± 0.1 pc)
Absolute magnitude (MV)+2.79[1]
Details
Mass1.48[4] M☉
Radius1.93[5] R☉
Luminosity6.02[5] L☉
Surface gravity (log g)3.99[5] cgs
Temperature6,505[5] K
Metallicity [Fe/H]+0.09[4] dex
Rotation27.1 days[6]
Rotational velocity (v sin i)6.0[7] km/s
Age2.27[4] Gyr
Other designations
CCDM J10534-2009, WDS J10535-2008
A: b3 Hya, 6 Crt, HD 94388, HIP 53252, HR 4521, SAO 156301, PPM 258261[8]
B: SAO 156299, PPM 258260[9]
C: 2MASS J10532473-2010016[10]
D: 2MASS J10532142-2009331[11]
Database references
SIMBADA
B
C
D

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

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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.[4] The effective temperature is about 6,505 K.

Optical companions

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BD−19 3124

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The secondary (BD−19 3124) is a yellow main sequence star of spectral type G5.[12] The apparent magnitude of the star is +9.6.[13] The mass is about 1.5 M☉, the radius is about 2.1 R☉, the luminosity is about 7.2 L☉. The effective temperature is about 6,566 K.[citation needed] It is 119.6 arcseconds away from b3 Hydrae[14] and about 774 light-years (237 parsecs) away from the Solar System.[15]

UCAC2 23866861

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The third component (UCAC2 23866861) is a yellow dwarf of spectral type G.[citation needed] The apparent magnitude of the star is +11.6.[16] The mass is about 0.9 M☉, the radius is about 1.2 R☉, the luminosity is about 1.4 L☉. The effective temperature is about 5,761 K.[citation needed] It is separated from BD−19 3124 by 13.7 arc seconds[14] and is about 850 light-years (260 parsecs) away from the Solar System.[17]

UCAC2 23866855

[edit]

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.[18] The effective temperature is about 6,236 K.[citation needed] It is located 40.5 arc seconds away from BD−19 3124[14] and is about 3,820 light-years (1,170 parsecs) away from the Solar System.[19]

References

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  1. ^ a b 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. ^ a b c d e f g 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. ^ a b c d "VizieR Detailed Page". Archived from the original on 2016-03-04. Retrieved 2012-07-13.
  4. ^ a b c d 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. ^ a b c d 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. ^ "BD-19 3124". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-09-14.
  10. ^ "UCAC2 23866861". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-09-14.
  11. ^ "UCAC2 23866855". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2025-09-14.
  12. ^ 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.
  13. ^ 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.
  14. ^ a b c 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.
  15. ^ 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.
  16. ^ 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.
  17. ^ 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.
  18. ^ 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.
  19. ^ 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.