B3 Hydrae

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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]
Distance 98.1 ± 0.4  ly
(30.1 ± 0.1  pc)
Absolute magnitude  (MV)+2.79 [1]
Details
Mass 1.48 [4]   M☉
Radius 1.93 [5]   R☉
Luminosity 6.02 [5]   L☉
Surface gravity (log g)3.99 [5]   cgs
Temperature 6,505 [5]   K
Metallicity [Fe/H]+0.09 [4]   dex
Rotation 27.1 days [6]
Rotational velocity (v sin i)6.0 [7]  km/s
Age 2.27 [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
SIMBAD A
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.

Contents

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. [4] 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. [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

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

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

  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. ↑ "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. 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.
  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.
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