Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Major |
Right ascension | 06h 36m 08.788s[1] |
Declination | −27° 37′ 20.27″[1] |
Apparent magnitude (V) | 7.63[2] |
Characteristics | |
Evolutionary stage | main sequence |
Spectral type | G6V[3] |
B−V color index | 0.714±0.002[2] |
Astrometry | |
Radial velocity (Rv) | 4.238±0.0003[4] km/s |
Proper motion (μ) | RA: 21.582 mas/yr[1] Dec.: −262.843 mas/yr[1] |
Parallax (π) | 26.7476 ± 0.0217 mas[1] |
Distance | 121.94 ± 0.10 ly (37.39 ± 0.03 pc) |
Absolute magnitude (MV) | 4.64[2] |
Details | |
Mass | 1.05±0.01[5] M☉ |
Radius | 1.12±0.01[5] R☉ |
Luminosity | 1.219±0.005[5] L☉ |
Surface gravity (log g) | 4.35±0.01[5] cgs |
Temperature | 5,736±21[5] K |
Metallicity [Fe/H] | 0.23[6] dex |
Rotational velocity (v sin i) | 1.953[6] km/s |
Age | 5.5±0.6[5] Gyr |
Other designations | |
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.[4] Although it has an absolute magnitude of 4.64,[2] at the distance of this system the apparent visual magnitude is 7.63;[2] 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.[8]
The spectrum of HD 47186 matches a G-type main-sequence star with a stellar classification of G6V.[3] It is an estimated 5.5[5] billion years old and is spinning with a projected rotational velocity of 2 km/s.[6] The star has 5% greater mass and a 12% larger girth compared to the Sun.[5] The abundance of iron, a measure of the star's metallicity, is 1.7 times more than the Sun, making it metal-rich.[6] HD 47186 is radiating 1.2 times the luminosity of the Sun from its photosphere at an effective temperature of 5,736 K.[5]
GaiaDR3
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