HD 73468
Star in the constellation Volcans
From Wikipedia, the free encyclopedia
HD 73468 (HR 3417) is a solitary star in the southern circumpolar constellation Volans. It is faintly visible to the naked eye with an apparent magnitude of 6.10,[2] and is estimated to be 420 light years away based on parallax measurements.[1] However, it is approaching the Solar System with a heliocentric radial velocity of −26.5 km/s.[6]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Volans |
| Right ascension | 08h 32m 41.77s[1] |
| Declination | −73° 21′ 24.44″[1] |
| Apparent magnitude (V) | 6.10±0.01[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch[3] |
| Spectral type | G8 III[4] |
| U−B color index | +0.65[5] |
| B−V color index | +0.95[5] |
| Astrometry | |
| Radial velocity (Rv) | −26.5±0.4[6] km/s |
| Proper motion (μ) | RA: −54.973 mas/yr[1] Dec.: +73.054 mas/yr[1] |
| Parallax (π) | 7.7564±0.0247 mas[1] |
| Distance | 420 ± 1 ly (128.9 ± 0.4 pc) |
| Absolute magnitude (MV) | +0.69[7] |
| Details[8] | |
| Mass | 2.11±0.06 M☉ |
| Radius | 10.24±0.16 R☉ |
| Luminosity | 59±1 L☉ |
| Surface gravity (log g) | 2.73±0.06 cgs |
| Temperature | 5,001±32 K |
| Metallicity [Fe/H] | −0.09±0.03 dex |
| Rotational velocity (v sin i) | 2.1±1.3[9] km/s |
| Other designations | |
| 33 G. Volantis, CD−72°471, CPD−72°713, GC 11776, HD 73468, HIP 41907, HR 3417, SAO 256524[10][11] | |
| Database references | |
| SIMBAD | data |
HD 73468 is a star with a classification of G8 III,[4] indicating that it is a giant star. It is currently on the horizontal branch[3] — generating energy via helium fusion in its core. HD 73468 has twice the mass of the Sun but has expanded to 10.24 times the radius of the Sun.[8] It shines with a luminosity of 59 L☉ from its swollen photosphere at an effective temperature of 5,001 K,[8] giving a yellow hue. HD 73468 is metal deficient with an iron abundance 81% that of the Sun[8] and spins with a projected rotational velocity of about 2.1 km/s.[9]
