HD 50002
Star in the constellation Volans
From Wikipedia, the free encyclopedia
HD 50002 (HR 2536) is a solitary star in the southern circumpolar constellation Volans. It is faintly visible to the naked eye with an apparent magnitude of 6.09[3] and is located at a distance of 708 light years.[2] However, it is drifting further with a heliocentric radial velocity of 5.1 km/s.[6]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Volans[1] |
| Right ascension | 06h 44m 55.6456s[2] |
| Declination | −70° 26′ 01.527″[2] |
| Apparent magnitude (V) | 6.09±0.01[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K3 III[4] |
| U−B color index | +1.50[5] |
| B−V color index | +1.33[5] |
| Astrometry | |
| Radial velocity (Rv) | 5.1±0.4[6] km/s |
| Proper motion (μ) | RA: −16.313 mas/yr[2] Dec.: +6.287 mas/yr[2] |
| Parallax (π) | 4.6072±0.0320 mas[2] |
| Distance | 708 ± 5 ly (217 ± 2 pc) |
| Absolute magnitude (MV) | −0.35[1] |
| Details | |
| Mass | 1.23[7] M☉ |
| Radius | 27.86[8] R☉ |
| Luminosity | 257±5[9] L☉ |
| Surface gravity (log g) | 1.59[7] cgs |
| Temperature | 4,444±122[10] K |
| Metallicity [Fe/H] | +0.22[11] dex |
| Rotational velocity (v sin i) | <1[12] km/s |
| Other designations | |
| 4 G. Volantis, CPD−70°560, GC 8895, HD 50002, HIP 32332, HR 2536, SAO 256331[13][14] | |
| Database references | |
| SIMBAD | data |
HD 50002 has a classification of K3 III,[4] indicating that it is a red giant. HD 50002 has a comparable mass to the Sun,[7] but has expanded to an enlarged radius of 27.9 R☉.[8] It radiates at 257 times the luminosity of the Sun[9] from its photosphere at an effective temperature of 4,444 K,[10] giving an orange hue. HD 50002 is metal enriched, with 166% the abundance of heavy metals compared to the Sun,[11] and has a projected rotational velocity too low to be measured accurately.[12]