Astronomy:B3 Hydrae

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For other stars with this Bayer designation, see b Hydrae.
Short description: Multiple star system in the constellation Hydra
b3 Hydrae
Observation data
Equinox J2000.0]] (ICRS)
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[2] mas
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

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. ↑ 1.0 1.1 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.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 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. ↑ 3.0 3.1 3.2 3.3 "VizieR Detailed Page". http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=5050&-corr=PK=HR&-out.max=9999&HR=4251. Retrieved 2012-07-13. 
  4. ↑ 4.0 4.1 4.2 4.3 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. doi:10.1051/0004-6361/201732209. Bibcode: 2018A&A...614A..55A. 
  5. ↑ 5.0 5.1 5.2 5.3 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. 
  6. ↑ Oelkers, Ryan J.; Rodriguez, Joseph E.; Stassun, Keivan G.; Pepper, Joshua; Somers, Garrett; Kafka, Stella; Stevens, Daniel J.; Beatty, Thomas G. et al. (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. doi:10.3847/1538-3881/aa9bf4. Bibcode: 2018AJ....155...39O. 
  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. doi:10.1051/0004-6361:20021642. Bibcode: 2003A&A...398..647R. 
  8. ↑ "6 Crateris". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=6+Crateris. 
  9. ↑ "BD-19 3124". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BD-19+3124. 
  10. ↑ "UCAC2 23866861". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=UCAC2+23866861. 
  11. ↑ "UCAC2 23866855". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=UCAC2+23866855. 
  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. doi:10.1051/0004-6361/202346759. Bibcode: 2023A&A...677A.137M. 
  13. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355. Bibcode: 2000A&A...355L..27H. 
  14. ↑ 14.0 14.1 14.2 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. doi:10.1086/323920. Bibcode: 2001AJ....122.3466M. 
  15. ↑ 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.
  16. ↑ Nascimbeni, V.; Piotto, G.; Ortolani, S.; Giuffrida, G.; Marrese, P. M.; Magrin, D.; Ragazzoni, R.; Pagano, I. et al. (2016). "An all-sky catalogue of solar-type dwarfs for exoplanetary transit surveys". Monthly Notices of the Royal Astronomical Society 463 (4): 4210. doi:10.1093/mnras/stw2313. Bibcode: 2016MNRAS.463.4210N. 
  17. ↑ 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.
  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. (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.



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