| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 01m 17.35683s |
| Declination | +26° 17′ 29.0764″ |
| Apparent magnitude (V) | 5.69 |
| Characteristics | |
| Spectral type | B5V |
| U−B color index | −0.55 |
| B−V color index | −0.086±0.002 |
| Astrometry | |
| Radial velocity (Rv) | −20.4±1.2 km/s |
| Proper motion (μ) | RA: −0.489 mas/yr Dec.: −9.207 mas/yr |
| Parallax (π) | 4.1038 ± 0.0835 mas |
| Distance | 790 ± 20 ly (244 ± 5 pc) |
| Absolute magnitude (MV) | −0.80 |
| Details | |
| Mass | 5.4 M☉ |
| Luminosity | 232.54 L☉ |
| Surface gravity (log g) | 4.5 cgs |
| Temperature | 10,540 K |
| Rotational velocity (v sin i) | 268±34 km/s |
| Age | 11 Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 176871 is a single 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. 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. The star is drifting closer with a radial velocity of −20 km/s.
This is a normal B-type main-sequence star with a stellar classification of B5V, which means it is generating energy via core hydrogen fusion. The star is around 11 million years old with 5.4 times the mass of the Sun and is spinning rapidly with a projected rotational velocity of 268 km/s. It is radiating 233 times the luminosity of the Sun from its photosphere at an effective temperature of 10,540 K.
References
- ^ 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.