HD 45184
Star in the constellation Canis Major / From Wikipedia, the free encyclopedia
HD 45184 is a star in the southern constellation of Canis Major. It is a yellow-hued star near the lower limit of visibility to the naked eye with an apparent visual magnitude of 6.37.[2] The star is located at a distance of 71.65 light years from the Sun based on parallax.[1] It is drifting closer with a radial velocity of −3.8 km/s.[1]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Canis Major |
Right ascension | 06h 24m 43.87975s[1] |
Declination | –28° 46′ 48.4163″[1] |
Apparent magnitude (V) | 6.37[2] |
Characteristics | |
Evolutionary stage | main sequence |
Spectral type | G2Va[3] |
Apparent magnitude (B) | 6.996[2] |
Apparent magnitude (J) | 5.219[4] |
Apparent magnitude (H) | 4.962[4] |
Apparent magnitude (K) | 4.871[4] |
B−V color index | 0.626±0.007[2] |
Astrometry | |
Radial velocity (Rv) | −3.828±0.0003[1] km/s |
Proper motion (μ) | RA: −165.257[1] mas/yr Dec.: −121.826[1] mas/yr |
Parallax (π) | 45.5224 ± 0.0320 mas[1] |
Distance | 71.65 ± 0.05 ly (21.97 ± 0.02 pc) |
Absolute magnitude (MV) | 4.67[2][5] |
Details | |
Mass | 1.08±0.04[6] M☉ |
Radius | 1.05±0.02[1] R☉ |
Luminosity | 1.178+0.002 −0.001[1] L☉ |
Surface gravity (log g) | 4.47±0.02[7] cgs |
Temperature | 5,862+72 −48[1] K |
Metallicity [Fe/H] | 0.070±0.016[6] dex |
Rotation | 20.0±0.1 d[6] |
Rotational velocity (v sin i) | 2.1[7] km/s |
Age | 3.0+0.7 −1.4[6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
This object is an ordinary G-type main-sequence star with a stellar classification of G2Va,[3] and it is considered a solar twin.[5] The mass, size, and luminosity of the star are slightly higher than for the Sun, and it has a near solar metallicity – what astronomers term the abundance of elements with higher atomic numbers than helium. The star is around three billion years old and is spinning with a 20-day period.[6] It has a 5.14[9]-year magnetic activity cycle that has a lower amplitude than on the Sun.[7]