HD 176871
Star in the constellation Lyra
From Wikipedia, the free encyclopedia
HD 176871 is a single[9] 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.[1] 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.[1] The star is drifting closer with a radial velocity of −20 km/s.[1]
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Lyra[1] |
| Right ascension | 19h 01m 17.35683s[2] |
| Declination | +26° 17′ 29.0764″[2] |
| Apparent magnitude (V) | 5.69[1] |
| Characteristics | |
| Spectral type | B5V[3][1][4] |
| U−B color index | −0.55[3] |
| B−V color index | −0.086±0.002[1] |
| Astrometry | |
| Radial velocity (Rv) | −20.4±1.2[1] km/s |
| Proper motion (μ) | RA: −0.489[2] mas/yr Dec.: −9.207[2] mas/yr |
| Parallax (π) | 4.1038±0.0835 mas[2] |
| Distance | 790 ± 20 ly (244 ± 5 pc) |
| Absolute magnitude (MV) | −0.80[1] |
| Details | |
| Mass | 4.1[5] M☉ |
| Radius | 5.2[6] R☉ |
| Luminosity | 394[5] L☉ |
| Surface gravity (log g) | 4.5[4] cgs |
| Temperature | 11,688[6] K |
| Rotational velocity (v sin i) | 268±34[7] km/s |
| Age | 11[4] Myr |
| Other designations | |
| BD+26°3429, FK5 3518, GC 26151, HD 176871, HIP 93393, HR 7202, SAO 86707[8] | |
| 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.[7] It is radiating 233[10] times the luminosity of the Sun from its photosphere at an effective temperature of 10,540 K.[10]