HD 76151
Star in the constellation Hydra
From Wikipedia, the free encyclopedia
HD 76151 is a high proper motion, G-type main-sequence star and solar analog[4] in the constellation of Hydra 54.95 light-years from Earth.[2] It has an apparent visual magnitude of approximately 6.00, which means it is faintly visible to the naked eye under good viewing conditions.[3] An infrared excess has been detected around this star, most likely indicating the presence of a circumstellar disk at a radius of 7.9 AU. The temperature of this dust is 99 K.[8]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Hydra[1] |
| Right ascension | 08h 54m 17.9471s[2] |
| Declination | −05° 26′ 04.054″[2] |
| Apparent magnitude (V) | 6.00[3] |
| Characteristics | |
| Evolutionary stage | Main sequence[2] |
| Spectral type | G2V[4] |
| U−B color index | +0.22[5] |
| B−V color index | +0.67[5] |
| R−I color index | +0.21[5] |
| Astrometry | |
| Radial velocity (Rv) | 31.99±0.12[2] km/s |
| Proper motion (μ) | RA: −413.648 mas/yr[2] Dec.: 30.619 mas/yr[2] |
| Parallax (π) | 59.3595±0.0408 mas[2] |
| Distance | 54.95 ± 0.04 ly (16.85 ± 0.01 pc) |
| Absolute magnitude (MV) | +4.81[1] |
| Details[4] | |
| Mass | 1.053+0.056 −0.068 M☉ |
| Radius | 1.125+0.035 −0.011 R☉ |
| Surface gravity (log g) | 4.35±0.18 cgs |
| Temperature | 5,790±170 K |
| Metallicity [Fe/H] | 0.24±0.09 dex |
| Rotation | 15 days[6] |
| Rotational velocity (v sin i) | 3[7] km/s |
| Age | 5.5+2.5 −2.1 Gyr |
| Other designations | |
| BD−04 2490, GC 12307, GJ 327, HD 76151, HIP 43726, HR 3538, SAO 136389, PPM 191823, LTT 3283, NLTT 20504[3] | |
| Database references | |
| SIMBAD | data |
HD 76151 has an age of roughly 5.5 billion years old, with estimates ranging from 3.4 to 9.6 billion years. The stellar atmosphere has an effective temperature of around 5,790 K (5,520 °C; 9,960 °F). The radius of HD 76151 is 1.125 solar radii (783,000 km) based on spectroscopic observations, though Gaia DR3 estimates a radius of 0.977 solar radii (680,000 km). It is slightly metal-rich and is a member of the thin disk population.[4]