HD 163376

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]

HD 163376
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]
Distance450 ± 20 ly
(139 ± 5 pc)
Absolute magnitude (MV)−0.82[2]
Details
Mass1.12[5] M☉
Radius61+6
−7[6] R☉
Luminosity832±42[6] L☉
Surface gravity (log g)0.79[5] cgs
Temperature3,972+244
−194[6] K
Metallicity [Fe/H]+0.04[5] dex
Other designations
NSV 24051, CD−41°12231, HD 163376, HIP 87936, HR 6682, SAO 228578[7]
Database references
SIMBADdata

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
  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. "HD 163376". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-08-03.
  8. 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.
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