Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scorpius |
Right ascension | 17h 57m 47.80338s [1] |
Declination | −41° 42′ 58.6612″ [1] |
Apparent magnitude (V) | 4.88 [2] |
Characteristics | |
Spectral type | M0 III [3] |
B−V color index | 1.617±0.081 [2] |
Variable type | suspected [4] |
Astrometry | |
Radial velocity (Rv) | 4.4±2.8 [2] km/s |
Proper motion (μ) |
RA: −3.97±0.35
[1]
mas/
yr Dec.: −15.02±0.13 [1] mas/ yr |
Parallax (π) | 7.22 ± 0.27 mas [1] |
Distance | 450 ± 20
ly (139 ± 5 pc) |
Absolute magnitude (MV) | −0.82 [2] |
Details | |
Mass | 1.12 [5] M☉ |
Radius | 61+6 −7 [6] R☉ |
Luminosity | 832±42 [6] L☉ |
Surface gravity (log g) | 0.79 [5] cgs |
Temperature | 3,972+244 −194 [6] K |
Metallicity [Fe/H] | +0.04 [5] dex |
Other designations | |
Database references | |
SIMBAD | data |
HD 163376 is a single [8] 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. [2] 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. [2] The absolute magnitude of this star is −0.82. [2]
This object is an aging red giant star with a stellar classification of M0 III, [3] 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. [6] It is a suspected variable star of unknown type, with a brightness that has been measured ranging from 4.94 down to 4.98. [4] The star is radiating 832 times the Sun's luminosity from its photosphere at an effective temperature of 3,972 K. [6]