HD 46815
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Columba |
| Right ascension | 06h 33m 49.4800s |
| Declination | −36° 13′ 55.2951″ |
| Apparent magnitude (V) | 5.40±0.01 |
| Characteristics | |
| Spectral type | K3 III |
| U−B color index | +1.72 |
| B−V color index | +1.42 |
| Astrometry | |
| Radial velocity (Rv) | 32.2±2.8 km/s |
| Proper motion (μ) | RA: −15.622 mas/yr Dec.: +99.481 mas/yr |
| Parallax (π) | 7.9846±0.0528 mas |
| Distance | 408 ± 3 ly (125.2 ± 0.8 pc) |
| Absolute magnitude (MV) | +0.03 |
| Details | |
| Mass | 1.17 M☉ |
| Radius | 24.15 R☉ |
| Luminosity | 180±2 L☉ |
| Surface gravity (log g) | 1.68 cgs |
| Temperature | 4,297±122 K |
| Metallicity [Fe/H] | +0.08 dex |
| Rotational velocity (v sin i) | 2.3±1.2 km/s |
| Other designations | |
| 106 G. Columba, CD−36°2990, CPD−36°994, GC 8559, HD 46815, HIP 31299, HR 2411, SAO 196945 | |
| Database references | |
| SIMBAD | data |
HD 46815 (HR 2411) is a solitary star in the southern constellation Columba. It is faintly visible to the naked eye with an apparent magnitude of 5.4 and is estimated to be 408 light years away. However, it is receding with a heliocentric radial velocity of 32.2 km/s.
HD 46815 has a stellar classification of K3 III, indicating that it is a red giant. At present it has 117% the mass of the Sun but has expanded to 24.15 times its girth. It shines with a luminosity of 180 L☉ from its enlarged photosphere at an effective temperature of 4,297 K, giving an orange hue. HD 46815 has a metallicity 120% that of the Sun and is believed to be a member of the old disk. Due to it being a giant star, it has a low projected rotational velocity of 2.3 km/s.