HD 47475
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Columba |
| Right ascension | 06h 36m 51.27308s |
| Declination | −41° 33′ 25.6990″ |
| Apparent magnitude (V) | 6.34±0.01 |
| Characteristics | |
| Spectral type | K0 II |
| B−V color index | +1.15 |
| Astrometry | |
| Radial velocity (Rv) | 13.8±0.4 km/s |
| Proper motion (μ) | RA: +1.235 mas/yr Dec.: +7.745 mas/yr |
| Parallax (π) | 1.835±0.0171 mas |
| Distance | 1,780 ± 20 ly (545 ± 5 pc) |
| Absolute magnitude (MV) | −2.01 |
| Details | |
| Mass | 4.0 M☉ |
| Radius | 44.8 R☉ |
| Luminosity | 1,035 L☉ |
| Surface gravity (log g) | 1.66 cgs |
| Temperature | 4,845±122 K |
| Metallicity [Fe/H] | −0.3 dex |
| Rotational velocity (v sin i) | 5.5±2 km/s |
| Other designations | |
| 111 G. Columbae, CD−41 2488, HD 47475, HIP 31063, HR 2445, SAO 218060 | |
| Database references | |
| SIMBAD | data |
HD 47475 (HR 2445) is a solitary star located in the southern constellation Columba. With an apparent magnitude of 6.34, its barely visible to the naked eye under ideal conditions. The star is located 1,720 light years away from the Solar System, but is drifting away with a heliocentric radial velocity of 15.77 km/s.