HD 163376 is a single[8] star in the southern constellation of Scorpius. It has a ruddy hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.88.[2] The distance to this star, as determined using parallax measurements, is approximately 450 light years. It is drifting further from the Sun with a radial velocity of about 4 km/s.[2] The absolute magnitude of this star is −0.82.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 57m 47.80338s[1] |
| Declination | −41° 42′ 58.6612″[1] |
| Apparent magnitude (V) | 4.88[2] |
| Characteristics | |
| Spectral type | M0 III[3] |
| B−V color index | 1.617±0.081[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | 4.4±2.8[2] km/s |
| Proper motion (μ) | RA: −3.97±0.35[1] mas/yr Dec.: −15.02±0.13[1] mas/yr |
| Parallax (π) | 7.22 ± 0.27 mas[1] |
| Distance | 450 ± 20 ly (139 ± 5 pc) |
| Absolute magnitude (MV) | −0.82[2] |
| Details | |
| Mass | 1.12[5] M☉ |
| Radius | 61+6 −7[6] R☉ |
| Luminosity | 832±42[6] L☉ |
| Surface gravity (log g) | 0.79[5] cgs |
| Temperature | 3,972+244 −194[6] K |
| Metallicity [Fe/H] | +0.04[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an aging red giant star with a stellar classification of M0 III,[3] having exhausted the supply of hydrogen at its core then cooled and expanded. At present it has a radius around 61 times the radius of the Sun.[6] It is a suspected variable star of unknown type, with a brightness that has been measured ranging from 4.94 down to 4.98.[4] The star is radiating 832 times the Sun's luminosity from its photosphere at an effective temperature of 3,972 K.[6]
References
edit- ^ a b c d e 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 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. S2CID 119257644.
- ^ a b Houk, N. (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 2. Dept. of Astronomy, University of Michigan. Bibcode:1978mcts.book.....H.
- ^ a b Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
- ^ a b c Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ "HD 163376". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-03.
- ^ Eggleton, P. P.; Tokovinin, A. A. (September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. S2CID 14878976.