Astronomy:HD 163376
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Scorpius[1] |
| Right ascension | 17h 57m 47.80338s[2] |
| Declination | −41° 42′ 58.6612″[2] |
| Apparent magnitude (V) | 4.88[1] |
| Characteristics | |
| Evolutionary stage | asymptotic giant branch[3] |
| Spectral type | M0 III[4] |
| B−V color index | 1.617±0.081[1] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | 4.4±2.8[1] km/s |
| Proper motion (μ) | RA: −3.97±0.35[2] mas/yr Dec.: −15.02±0.13[2] mas/yr |
| Parallax (π) | 7.22 ± 0.27[2] mas |
| Distance | 450 ± 20 ly (139 ± 5 pc) |
| Absolute magnitude (MV) | −0.82[1] |
| Details | |
| Mass | 1.12[6] M☉ |
| Radius | 61+6 −7[7] R☉ |
| Luminosity | 832±42[7] L☉ |
| Surface gravity (log g) | 0.79[6] cgs |
| Temperature | 3,972+244 −194[7] K |
| Metallicity [Fe/H] | +0.04[6] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 163376 is a single[9] 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.[1] 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.[1] The absolute magnitude of this star is −0.82.[1]
This object is an aging red giant star with a stellar classification of M0 III,[4] 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.[7] It is a suspected variable star of unknown type, with a brightness that has been measured ranging from 4.94 down to 4.98.[5] The star is radiating 832 times the Sun's luminosity from its photosphere at an effective temperature of 3,972 K.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ Eggen, Olin J. (July 1992). "Asymptotic giant branch stars near the sun". Astronomical Journal 104 (1): 275–313. doi:10.1086/116239. Bibcode: 1992AJ....104..275E.
- ↑ 4.0 4.1 Houk, N. (1978). Michigan catalogue of two-dimensional spectral types for the HD stars. 2. Dept. of Astronomy, University of Michigan. Bibcode: 1978mcts.book.....H.
- ↑ 5.0 5.1 Samus, N. N. et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1 61 (1): 80–88. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S.
- ↑ 6.0 6.1 6.2 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. Bibcode: 2019A&A...628A..94A.
- ↑ 7.0 7.1 7.2 7.3 7.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ "HD 163376". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+163376.
- ↑ 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. doi:10.1111/j.1365-2966.2008.13596.x. Bibcode: 2008MNRAS.389..869E.
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