HD 10550
Star in the constellation Cetus
From Wikipedia, the free encyclopedia
HD 10550 is a single[8] star in the equatorial constellation of Cetus. It is a faint star but visible to the naked eye with an apparent visual magnitude of 4.98.[1] Based upon an annual parallax shift of 2.9564 mas,[2] it is located around 1,100 light years from the Sun. The star is moving closer with a heliocentric radial velocity of â33 km/s.[2] It has a high peculiar velocity of 72.7+5.7
â4.3 km/s and may be a runaway star.[9]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cetus[1] |
| Right ascension | 01h 42m 43.51077s[2] |
| Declination | â03° 41â² 24.7210â³[2] |
| Apparent magnitude (V) | 4.98[1] |
| Characteristics | |
| Spectral type | K2/3 III CN II[3] |
| BâV color index | 1.378±0.003[1] |
| Astrometry | |
| Radial velocity (Rv) | â33.28±0.15[2] km/s |
| Proper motion (μ) | RA: â8.989[2] mas/yr Dec.: â33.238[2] mas/yr |
| Parallax (Ï) | 2.9564±0.1730 mas[2] |
| Distance | 1,100 ± 60 ly (340 ± 20 pc) |
| Absolute magnitude (MV) | â2.82[1] |
| Details | |
| Radius | 77[4] Râ |
| Luminosity | 2,537[1] Lâ |
| Surface gravity (log g) | 1.83[5] cgs |
| Temperature | 4,110[5] K |
| Metallicity [Fe/H] | â0.12[5] dex |
| Rotational velocity (v sin i) | 10[6] km/s |
| Other designations | |
| BDâ04°260, FK5 1049, HD 10550, HIP 7999, HR 500, SAO 129465[7] | |
| Database references | |
| SIMBAD | data |
The stellar classification of this star is K2/3 III CN II,[3] showing the spectrum of an evolved K-type giant star with an overabundance of CN in the atmosphere. The measured angular diameter of this star, after correction for limb darkening, is 2.11±0.04 mas.[10] At the estimated distance of this star, this yields a physical size of about 77 times the radius of the Sun.[4] The star is radiating around 2,537[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,110 K.[5]
