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 |
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]
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]