HD 35984 is star in the northern constellation Auriga. It has an apparent magnitude of 6.20,[2] which, according to the Bortle scale, indicates it is faintly visible to the naked eye from dark rural skies. Parallax measurements by the Hipparcos satellite indicates it lies at a distance of roughly 290 light years away.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 29m 40.65401s[1] |
| Declination | +29° 11′ 11.2751″[1] |
| Apparent magnitude (V) | 6.20[2] |
| Characteristics | |
| Spectral type | F6III[2] |
| U−B color index | +0.02[3] |
| B−V color index | +0.45[3] |
| Astrometry | |
| Radial velocity (Rv) | +13.58[2] km/s |
| Proper motion (μ) | RA: 28.45[1] mas/yr Dec.: -46.43[1] mas/yr |
| Parallax (π) | 11.27 ± 0.59 mas[1] |
| Distance | 290 ± 20 ly (89 ± 5 pc) |
| Absolute magnitude (MV) | 1.50[4] |
| Details | |
| Mass | 1.76[2] M☉ |
| Luminosity | 1.32[2] L☉ |
| Surface gravity (log g) | 4.18[2] cgs |
| Temperature | 6,939[2] K |
| Metallicity [Fe/H] | 0.19[2] dex |
| Rotational velocity (v sin i) | 40[5] km/s |
| Age | 1.26±0.12[6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
A stellar classification of F6III suggests that this is an evolved giant star that has consumed the supply of hydrogen at its core.[2] 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.[7]
References
edit- ^ a b c d e f van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600
- ^ a b c d e f g h i j 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
- ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data.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
- ^ 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
- ^ 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.
- ^ 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
- ^ 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
External links
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