HD 79917
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vela[1] |
| Right ascension | 09h 15m 36.7081s[2] |
| Declination | −38° 34′ 11.7903″[2] |
| Apparent magnitude (V) | +4.92[1] |
| Characteristics | |
| Spectral type | K1III[3] |
| B−V color index | 1.084±0.052[1] |
| Astrometry | |
| Radial velocity (Rv) | +1.62±0.14[2] km/s |
| Proper motion (μ) | RA: −71.004±0.148[2] mas/yr Dec.: −10.527±0.186[2] mas/yr |
| Parallax (π) | 14.3202±0.1227 mas[2] |
| Distance | 228 ± 2 ly (69.8 ± 0.6 pc) |
| Absolute magnitude (MV) | +0.73[1] |
| Details | |
| Mass | 1.8[4] M☉ |
| Radius | 12.63+0.23 −0.36[2] R☉ |
| Luminosity | 66.8±0.7[2] L☉ |
| Surface gravity (log g) | 2.63[5] cgs |
| Temperature | 4,643+69 −43[2] K |
| Metallicity [Fe/H] | +0.12[5] dex |
| Rotational velocity (v sin i) | 4.28[5] km/s |
| Other designations | |
| l Vel, CD−38°5408, FK5 2737, HD 79917, HIP 45439, HR 3682, SAO 200159[6] | |
| Database references | |
| SIMBAD | data |
HD 79917 is a single[7] star in the southern constellation of Vela. It has the Bayer designation l (lowercase L) Velorum, while HD 79917 is the star's identifier from the Henry Draper Catalogue. The star has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of +4.92.[1] It is located at a distance of approximately 228 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +1.6 km/s.[2]
This is an aging giant star with a stellar classification of K1III,[3] having exhausted is core hydrogen then cooled and expanded off the main sequence. It has 12.6 times the girth of the Sun and is radiating 67 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,643 K.[2]
References
[edit]- ^ a b c d e 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. XHIP record for this object at VizieR.
- ^ a b c d e f g h i j k 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.
- ^ a b Houk, Nancy (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 3, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1982mcts.book.....H.
- ^ Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy and Astrophysics. 633: A34. arXiv:1910.12732. Bibcode:2020A&A...633A..34C. doi:10.1051/0004-6361/201936360.
- ^ a b c Perdelwitz, V.; Trifonov, T.; Teklu, J. T.; Sreenivas, K. R.; Tal-Or, L. (2024). "Analysis of the public HARPS/ESO spectroscopic archive. Ca II H&K time series for the HARPS radial velocity database". Astronomy and Astrophysics. 683. arXiv:2311.12438. Bibcode:2024A&A...683A.125P. doi:10.1051/0004-6361/202348263.
- ^ "HD 79917". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-25.
- ^ 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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