HD 102839
Star in the constellation Musca
From Wikipedia, the free encyclopedia
HD 102839 is a yellow hued supergiant star in the southern constellation of Musca. With an apparent visual magnitude of 4.98,[1] it is faintly visible to the naked eye under good viewing conditions. Based on a parallax of 2.11 mas,[2] it is located at a distance of approximately 1,550 light-years (480 pc) away from Earth. The star is drifting further away with a line of sight velocity component of +16 km/s.[5]
 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Musca[1] |
| Right ascension | 11h 49m 56.61541s[2] |
| Declination | −70° 13′ 32.8408″[2] |
| Apparent magnitude (V) | 4.98[1] |
| Characteristics | |
| Spectral type | G6Ib[3] |
| U−B color index | +1.22[4] |
| B−V color index | +1.40[4] |
| Astrometry | |
| Radial velocity (Rv) | +15.90[5] km/s |
| Proper motion (μ) | RA: −8.113[2] mas/yr[2] Dec.: −0.834 mas/yr[2] |
| Parallax (π) | 2.1101±0.1063 mas[2] |
| Distance | 1,550 ± 80 ly (470 ± 20 pc) |
| Absolute magnitude (MV) | −2.33[1] |
| Details | |
| Mass | 2.3[6] M☉ |
| Radius | 78[2] R☉ |
| Luminosity | 1,593[1] L☉ |
| Surface gravity (log g) | 0.63[6] cgs |
| Temperature | 4,500[7] K |
| Metallicity [Fe/H] | −0.34[6] dex |
| Rotational velocity (v sin i) | 7.6[8] km/s |
| Other designations | |
| CPD−69°1595, FK5 2945, GC 16206, HD 102839, HIP 57696, HR 4538, SAO 251604, GSC 09230-02344[9] | |
| Database references | |
| SIMBAD | data |
This star has a stellar classification of G6Ib,[3] matching an evolved G-type supergiant star. With 2.3 times the mass of the Sun,[6] it has expanded to 78 times the Sun's radius.[2] It is spinning with a projected rotational velocity of 7.6 km/s.[8] HD 102839 is radiating almost 1,600[1] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,500 K.[7]
