| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17 57 47.80338 |
| Declination | −41° 42′ 58.6612″ |
| Apparent magnitude (V) | 4.88 |
| Characteristics | |
| Spectral type | M0 III |
| B−V color index | 1.617±0.081 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | 4.4±2.8 km/s |
| Proper motion (μ) | RA: −3.97±0.35 mas/yr Dec.: −15.02±0.13 mas/yr |
| Parallax (π) | 7.22 ± 0.27 mas |
| Distance | 450 ± 20 ly (139 ± 5 pc) |
| Absolute magnitude (MV) | −0.82 |
| Details | |
| Mass | 1.12 M☉ |
| Radius | 61+6 −7 R☉ |
| Luminosity | 832±42 L☉ |
| Surface gravity (log g) | 0.79 cgs |
| Temperature | 3,972+244 −194 K |
| Metallicity | +0.04 dex |
| Other designations | |
| NSV 24051, CD−41°12231, HD 163376, HIP 87936, HR 6682, SAO 228578 | |
| Database references | |
| SIMBAD | data |
HD 163376 is a single 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. 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. The absolute magnitude of this star is −0.82.
This object is an aging red giant star with a stellar classification of M0 III, 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. It is a suspected variable star of unknown type, with a brightness that has been measured ranging from 4.94 down to 4.98. The star is radiating 832 times the Sun's luminosity from its photosphere at an effective temperature of 3,972 K.
References
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
- ^ 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.
