HD 47186
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 36m 08.788s |
| Declination | −27° 37′ 20.27″ |
| Apparent magnitude (V) | 7.63 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G6V |
| B−V color index | 0.714±0.002 |
| Astrometry | |
| Radial velocity (Rv) | 4.238±0.0003 km/s |
| Proper motion (μ) | RA: 21.582 mas/yr Dec.: −262.843 mas/yr |
| Parallax (π) | 26.7476±0.0217 mas |
| Distance | 121.94 ± 0.10 ly (37.39 ± 0.03 pc) |
| Absolute magnitude (MV) | 4.64 |
| Details | |
| Mass | 1.05±0.01 M☉ |
| Radius | 1.12±0.01 R☉ |
| Luminosity | 1.219±0.005 L☉ |
| Surface gravity (log g) | 4.35±0.01 cgs |
| Temperature | 5,736±21 K |
| Metallicity [Fe/H] | 0.23 dex |
| Rotational velocity (v sin i) | 1.953 km/s |
| Age | 5.5±0.6 Gyr |
| Other designations | |
| CD−27°3124, HD 47186, HIP 31540, SAO 172008, LTT 2597, NLTT 16742 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 47186 is a star with a pair of orbiting exoplanets in the southern constellation of Canis Major. The system is located at a distance of 122 light years from the Sun based on parallax measurements, and is drifting further away with a radial velocity of 4.2 km/s. Although it has an absolute magnitude of 4.64, at the distance of this system the apparent visual magnitude is 7.63; too faint to be seen with the naked eye. It has a high proper motion, traversing the celestial sphere at an angular rate of 0.272″·yr−1.
The spectrum of HD 47186 matches a G-type main-sequence star with a stellar classification of G6V. It is an estimated 5.5 billion years old and is spinning with a projected rotational velocity of 2 km/s. The star has 5% greater mass and a 12% larger girth compared to the Sun. The abundance of iron, a measure of the star's metallicity, is 1.7 times more than the Sun, making it metal-rich. HD 47186 is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,736 K.