HD 45184
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 06h 24m 43.87975s |
| Declination | −28° 46′ 48.4163″ |
| Apparent magnitude (V) | 6.37 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G2Va |
| Apparent magnitude (B) | 6.996 |
| Apparent magnitude (J) | 5.219 |
| Apparent magnitude (H) | 4.962 |
| Apparent magnitude (K) | 4.871 |
| B−V color index | 0.626±0.007 |
| Astrometry | |
| Radial velocity (Rv) | −3.828±0.0003 km/s |
| Proper motion (μ) | RA: −165.257 mas/yr Dec.: −121.826 mas/yr |
| Parallax (π) | 45.5224±0.0320 mas |
| Distance | 71.65 ± 0.05 ly (21.97 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.67 |
| Details | |
| Mass | 1.08±0.04 M☉ |
| Radius | 1.05±0.02 R☉ |
| Luminosity | 1.178+0.002 −0.001 L☉ |
| Surface gravity (log g) | 4.47±0.02 cgs |
| Temperature | 5,862+72 −48 K |
| Metallicity [Fe/H] | 0.070±0.016 dex |
| Rotation | 20.0±0.1 d |
| Rotational velocity (v sin i) | 2.1 km/s |
| Age | 3.0+0.7 −1.4 Gyr |
| Other designations | |
| CD−29°2981, GJ 3394, HD 45184, HIP 30503, HR 2318, SAO 171711, PPM 250356 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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. The star is located at a distance of 71.65 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −3.8 km/s.
This object is an ordinary G-type main-sequence star with a stellar classification of G2Va, and it is considered a solar twin. 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. It has a 5.14-year magnetic activity cycle that has a lower amplitude than on the Sun.