HD 176871 is a single[8] star in the northern constellation of Lyra, positioned near the southern constellation border with Vulpecula. This object has a blue-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.69.[2] It is located at a distance of approximately 790 light years from the Sun based on parallax, and has an absolute magnitude of −0.80.[2] The star is drifting closer with a radial velocity of −20 km/s.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 01m 17.35683s[1] |
| Declination | +26° 17′ 29.0764″[1] |
| Apparent magnitude (V) | 5.69[2] |
| Characteristics | |
| Spectral type | B5V[3][2][4] |
| U−B color index | −0.55[3] |
| B−V color index | −0.086±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | −20.4±1.2[2] km/s |
| Proper motion (μ) | RA: −0.489[1] mas/yr Dec.: −9.207[1] mas/yr |
| Parallax (π) | 4.1038 ± 0.0835 mas[1] |
| Distance | 790 ± 20 ly (244 ± 5 pc) |
| Absolute magnitude (MV) | −0.80[2] |
| Details | |
| Mass | 5.4[4] M☉ |
| Luminosity | 232.54[5] L☉ |
| Surface gravity (log g) | 4.5[4] cgs |
| Temperature | 10,540[5] K |
| Rotational velocity (v sin i) | 268±34[6] km/s |
| Age | 11[4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a normal B-type main-sequence star with a stellar classification of B5V,[3] which means it is generating energy via core hydrogen fusion. The star is around 11[4] million years old with 5.4[4] times the mass of the Sun and is spinning rapidly with a projected rotational velocity of 268 km/s.[6] It is radiating 233[5] times the luminosity of the Sun from its photosphere at an effective temperature of 10,540 K.[5]
References
edit- ^ 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.
- ^ a b c d e f g h 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 c Hill, P. W.; Lynas-Gray, A. E. (September 1977), "UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes.", Monthly Notices of the Royal Astronomical Society, 180 (4): 691–702, Bibcode:1977MNRAS.180..691H, doi:10.1093/mnras/180.4.691.
- ^ a b c d e f Gullikson, Kevin; et al. (2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", The Astronomical Journal, 152 (2): 40, arXiv:1604.06456, Bibcode:2016AJ....152...40G, doi:10.3847/0004-6256/152/2/40, S2CID 119179065.
- ^ a b c d McDonald, I.; et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–357, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
- ^ a b Maestro, V.; et al. (2013), "Optical interferometry of early-type stars with PAVO@CHARA - I. Fundamental stellar properties", Monthly Notices of the Royal Astronomical Society, 434 (2): 1321, arXiv:1306.5937, Bibcode:2013MNRAS.434.1321M, doi:10.1093/mnras/stt1092.
- ^ "HD 176871". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-10.
- ^ 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.