HD 35984

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HD 35984
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga[1]
Right ascension 05h 29m 40.65382s[2]
Declination +29° 11′ 11.2704″[2]
Apparent magnitude (V) 6.20[3]
Characteristics
Evolutionary stage main sequence or subgiant[2]
Spectral type F6III[3]
U−B color index +0.02[4]
B−V color index +0.45[4]
Astrometry
Radial velocity (Rv)+13.98±0.15[2] km/s
Proper motion (μ) RA: +28.262[2] mas/yr
Dec.: −46.896[2] mas/yr
Parallax (π)12.5607±0.0293 mas[2]
Distance259.7 ± 0.6 ly
(79.6 ± 0.2 pc)
Absolute magnitude (MV)1.50[5]
Details
Mass1.31[6] M☉
Radius3.26[6] R☉
Luminosity16.7[6] L☉
Surface gravity (log g)3.53[6] cgs
Temperature6,465[6] K
Metallicity [Fe/H]0.19[3] dex
Rotation29.5 days[7]
Rotational velocity (v sin i)40[8] km/s
Age1.26±0.12[9] Gyr
Other designations
BD+29°909, HD 35984, HIP 25730, HR 1822, SAO 77205
Database references
SIMBADdata

HD 35984 is star in the northern constellation Auriga. It has an apparent magnitude of 6.20,[3] which, according to the Bortle scale, indicates it is faintly visible to the naked eye from dark rural skies. Parallax measurements by the Gaia satellite indicates it lies at a distance of roughly 260 light years.[2]

A stellar classification of F6III suggests that this is an evolved giant star that has consumed the supply of hydrogen at its core.[3] However, X-ray emission, variations in luminosity, and levels of lithium may indicate that this is instead a weak-lined T Tauri star—a low mass pre-main sequence star that is relatively poor in circumstellar matter.[10]

References

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  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d e f g h 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 e Luck, R. Earle; Heiter, Ulrike (June 2007). "Giants in the Local Region". The Astronomical Journal. 133 (6): 2464–2486. Bibcode:2007AJ....133.2464L. doi:10.1086/513194.
  4. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  5. ^ Holmberg, J.; Nordström, B.; Andersen, J. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511
  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. ^ 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.
  8. ^ Uesugi, Akira; Fukuda, Ichiro (1970). "Catalogue of rotational velocities of the stars". Contributions from the Institute of Astrophysics and Kwasan Observatory. University of Kyoto. Bibcode:1970crvs.book.....U.
  9. ^ Pace, G. (March 2013), "Chromospheric activity as age indicator. An L-shaped chromospheric-activity versus age diagram", Astronomy & Astrophysics, 551: 4, arXiv:1301.5651, Bibcode:2013A&A...551L...8P, doi:10.1051/0004-6361/201220364, S2CID 56420519, L8
  10. ^ Li, J. Z.; Hu, J. Y. (October 1998), "Newly discovered candidate weak-line T Tauri stars in the surrounding area of the Taurus-Auriga region", Astronomy and Astrophysics Supplement, 132 (2): 173–179, Bibcode:1998A&AS..132..173L, doi:10.1051/aas:1998288
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