HD 56618
Star in the constellation of Canis Major
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HD 56618 is a single[7] star in the southern constellation of Canis Major. It is a red-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.66.[1] This object is located at a distance of approximately 390 light years from the Sun based on parallax measurements. It is drifting further away with a radial velocity of +41.5 km/s,[1] having come to within 203 light-years some 2.2 million years ago.[1] Olin J. Eggen listed it as a probable member of the Hyades supercluster.[8]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Canis Major[1] |
| Right ascension | 07h 16m 34.99315s[2] |
| Declination | â27° 52â² 52.2453â³[2] |
| Apparent magnitude (V) | 4.66[1] |
| Characteristics | |
| Evolutionary stage | AGB[3] |
| Spectral type | M2III[4] |
| BâV color index | 1.589±0.028[1] |
| Astrometry | |
| Radial velocity (Rv) | +41.5±2.8[1] km/s |
| Proper motion (μ) | RA: â13.479[2] mas/yr Dec.: +38.625[2] mas/yr |
| Parallax (Ï) | 8.3189±0.2874 mas[2] |
| Distance | 390 ± 10 ly (120 ± 4 pc) |
| Absolute magnitude (MV) | â0.80[1] |
| Details | |
| Mass | 1.5[5] Mâ |
| Radius | 61.1+7.3 â6.9[2] Râ |
| Luminosity | 699.7±27.3[2] Lâ |
| Surface gravity (log g) | 1.35[5] cgs |
| Temperature | 3,797+233 â209[2] K |
| Metallicity [Fe/H] | â0.24[5] dex |
| Other designations | |
| CDâ27°3852, FK5 2562, HD 56618, HIP 35205, HR 2766, SAO 173360[6] | |
| Database references | |
| SIMBAD | data |
This is an aging red giant star currently on the asymptotic giant branch[3] with a stellar classification of M2III.[4] It is no longer undergoing core hydrogen fusion and has expanded to 61[2] times the radius of the Sun. The star is radiating 700[2] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,797 K.[2]