HD 30177
HD 30177 is a single star with a pair of orbiting exoplanets in the southern constellation Dorado. Based on parallax measurements, it is located at a distance of 181 light years from the Sun. It has an absolute magnitude of 4.72, but at that distance the star is too faint to be viewed by the naked eye with an apparent visual magnitude of 8.41. The star is drifting further away with a radial velocity of 62.7 km/s.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 04h 41m 54.374s |
| Declination | −58° 01′ 14.73″ |
| Apparent magnitude (V) | 8.41 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G8V |
| B−V color index | 0.773±0.015 |
| Astrometry | |
| Radial velocity (Rv) | 62.697±0.0013 km/s |
| Proper motion (μ) | RA: 66.303±0.023 mas/yr Dec.: −11.795±0.024 mas/yr |
| Parallax (π) | 18.0190 ± 0.0195 mas |
| Distance | 181.0 ± 0.2 ly (55.50 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.72±0.09 |
| Details | |
| Mass | 1.053±0.023 M☉ |
| Radius | 1.019±0.034 R☉ |
| Luminosity | 1.04±0.01 L☉ |
| Surface gravity (log g) | 4.417±0.034 cgs |
| Temperature | 5,607±47 K |
| Metallicity [Fe/H] | 0.39±0.05 dex |
| Rotation | ~45 d |
| Rotational velocity (v sin i) | 2.96±0.50 km/s |
| Age | 4.8±1.5 Gyr 2.525±1.954 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The spectrum of HD 30177 matches a late G-type main-sequence star with a stellar classification of G8V. It is a yellow dwarf with a mass and radius similar to the Sun that is fusing hydrogen in its core. The chromosphere shows a negligible level of magnetic activity. The abundance of iron, an indicator of the star's metallicity, is more than double the Sun's. It is radiating a similar luminosity to the Sun from its photosphere at an effective temperature of 5,607 K.