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HD 33632

HD 33632
Observation data
Epoch J2000      Equinox J2000 (ICRS)
Constellation Auriga[1]
Right ascension 05h 13m 17.448s[2]
Declination +37° 20′ 14.32″[2]
Apparent magnitude (V) 6.47[3]
Characteristics
Evolutionary stage main sequence[2] + brown dwarf[4]
Spectral type F8V[5]
Astrometry
Proper motion (μ) RA: −133.922[2] mas/yr
Dec.: −136.772[2] mas/yr
Parallax (π)37.8953±0.0263 mas[2]
Distance86.07 ± 0.06 ly
(26.39 ± 0.02 pc)
Absolute magnitude (MV)+4.40[1]
Details
Aa
Mass1.14[6] M☉
Radius1.11[6] R☉
Luminosity1.51[6] L☉
Surface gravity (log g)4.40[6] cgs
Temperature6,074[6] K
Age4.8[7] Gyr
Ab
Mass46±8 MJup
Radius0.97 RJup
Other designations
BD+37°1091, HD 33632, HIP 24332, WDS J05133+3720A[8]
Database references
SIMBADdata

HD 33632 is an F-type main-sequence star with a brown dwarf companion located in the constellation of Auriga. The brown dwarf was directly imaged in mid 2024.[4]

Brown dwarf

HD 33632 Ab has a radius of 0.97 Jupiter radii[4] and a mass of 46±8 Jupiter masses.[9]

References

  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 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. ^ 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.
  4. ^ a b c Morsy, Mona El; Currie, Thayne; Bovie, Danielle; Kuzuhara, Masayuki; Lacy, Brianna; Li, Yiting; Tobin, Taylor; Brandt, Timothy; Chilcote, Jeffrey (2025-04-03), "Dynamical and Atmospheric Characterization of the Substellar Companion HD 33632 Ab from Direct Imaging, Astrometry, and Radial-Velocity Data", The Astrophysical Journal, 981 (1): 20, arXiv:2407.20322, Bibcode:2025ApJ...981...20E, doi:10.3847/1538-4357/ada3be
  5. ^ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I.". The Astronomical Journal. 126 (4): 2048. arXiv:astro-ph/0308182. Bibcode:2003AJ....126.2048G. doi:10.1086/378365.
  6. ^ a b c d e 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. ^ 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.
  8. ^ "HD 33632". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-04-14.
  9. ^ Hsu, Chih-Chun; Wang, Jason J.; Xuan, Jerry W.; Ruffio, Jean-Baptiste; Morris, Evan; Echeverri, Daniel; Xin, Yinzi; Liberman, Joshua; Finnerty, Luke; Horstman, Katelyn; Sappey, Ben; Doppmann, Gregory W.; Mawet, Dimitri; Jovanovic, Nemanja; Fitzgerald, Michael P. (August 2024). "Rotation and Abundances of the Benchmark Brown Dwarf HD 33632 Ab from Keck/KPIC High-resolution Spectroscopy". The Astrophysical Journal. 971 (1): 9. arXiv:2405.08312. Bibcode:2024ApJ...971....9H. doi:10.3847/1538-4357/ad58d3. ISSN 0004-637X.
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