HD 75116
Star in the constellation of Volans
From Wikipedia, the free encyclopedia
HD 75116, also known as HR 3491, is a solitary, orange hued star in the southern circumpolar constellation Volans, the flying fish. It has an apparent magnitude of 6.31,[2] placing it near the limit for naked eye visibility. Parallax measurements from the Gaia spacecraft place the star relatively far at a distance of 930 light years.[1] It appears to be approaching the Solar System, having a heliocentric radial velocity of −17.5 km/s.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Volans |
| Right ascension | 08h 43m 54.32871s[1] |
| Declination | −68° 12′ 41.7018″[1] |
| Apparent magnitude (V) | 6.31±0.01[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[1] |
| Spectral type | K3 III:[3] |
| U−B color index | +1.78[4] |
| B−V color index | +1.50[4] |
| Astrometry | |
| Radial velocity (Rv) | −17.5±0.4[5] km/s |
| Proper motion (μ) | RA: +1.359 mas/yr[1] Dec.: +25.545 mas/yr[1] |
| Parallax (π) | 3.5061±0.0178 mas[1] |
| Distance | 930 ± 5 ly (285 ± 1 pc) |
| Absolute magnitude (MV) | −0.93[6] |
| Details | |
| Mass | 2.29±0.11 [7] M☉ |
| Radius | 52.2[8] R☉ |
| Luminosity | 431±7[9] L☉ |
| Surface gravity (log g) | 1.08[10] cgs |
| Temperature | 4,124±122[11] K |
| Rotational velocity (v sin i) | <1[12] km/s |
| Other designations | |
| 40 G. Volantis[13], CD−67°666, CPD−67°990, GC 12074, HD 75116, HIP 42850, HR 3491, SAO 250315[14] | |
| Database references | |
| SIMBAD | data |
This is a red giant with a spectral classification of K3 III:,[3] but there is uncertainty behind the class. Gaia Data Release 3 stellar evolution models place it on the red giant branch. It has 2.29 times the Sun’s mass[7] but has expanded to 52.2 times its girth.[8] HD 75116 radiates 431 times the luminosity of the Sun[9] from its swollen photosphere at an effective temperature of 4,124 K.[11] It rotates slowly like many giant stars, having a projected rotational velocity <1 km/s.[12]