HD 163376
Star in the constellation of Scorpius
From Wikipedia, the free encyclopedia
HD 163376 is a single[9] star in the southern constellation of Scorpius. It has a ruddy hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.88.[1] The distance to this star, as determined using parallax measurements, is approximately 450 light years. It is drifting further from the Sun with a radial velocity of about 4 km/s.[1] The absolute magnitude of this star is −0.82.[1]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius[1] |
| Right ascension | 17h 57m 47.80338s[2] |
| Declination | −41° 42′ 58.6612″[2] |
| Apparent magnitude (V) | 4.88[1] |
| Characteristics | |
| Evolutionary stage | asymptotic giant branch[3] |
| Spectral type | M0 III[4] |
| B−V color index | 1.617±0.081[1] |
| Variable type | suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | 4.4±2.8[1] km/s |
| Proper motion (μ) | RA: −3.97±0.35[2] mas/yr Dec.: −15.02±0.13[2] mas/yr |
| Parallax (π) | 7.22±0.27 mas[2] |
| Distance | 450 ± 20 ly (139 ± 5 pc) |
| Absolute magnitude (MV) | −0.82[1] |
| Details | |
| Mass | 1.12[6] M☉ |
| Radius | 61+6 −7[7] R☉ |
| Luminosity | 832±42[7] L☉ |
| Surface gravity (log g) | 0.79[6] cgs |
| Temperature | 3,972+244 −194[7] K |
| Metallicity [Fe/H] | +0.04[6] dex |
| Other designations | |
| NSV 24051, CD−41°12231, HD 163376, HIP 87936, HR 6682, SAO 228578[8] | |
| Database references | |
| SIMBAD | data |
This object is an aging red giant star with a stellar classification of M0 III,[4] having exhausted the supply of hydrogen at its core then cooled and expanded. At present it has a radius around 61 times the radius of the Sun.[7] It is a suspected variable star of unknown type, with a brightness that has been measured ranging from 4.94 down to 4.98.[5] The star is radiating 832 times the Sun's luminosity from its photosphere at an effective temperature of 3,972 K.[7]