HR 244
Star in the constellation Cassiopeia
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HR 244 is a single[8] star in the constellation Cassiopeia. It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 4.80.[3] Based upon parallax measurements, it is located at a distance of 62 light years from the Sun, and is drifting further away with a radial velocity of +20.7 km/s;[2] around 546,000 years ago it passed within 38 light-years of the Sun.[5] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.183 arcseconds per annum.[9]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Cassiopeia[1] |
| Right ascension | 00h 53m 04.19644s[2] |
| Declination | +61° 07′ 26.2993″[2] |
| Apparent magnitude (V) | 4.80[3] |
| Characteristics | |
| Evolutionary stage | subgiant[2] |
| Spectral type | F9V[4] |
| B−V color index | 0.540±0.008[5] |
| Astrometry | |
| Radial velocity (Rv) | +20.68±0.12[2] km/s |
| Proper motion (μ) | RA: –68.298[2] mas/yr Dec.: +169.435[2] mas/yr |
| Parallax (π) | 52.9017±0.1037 mas[2] |
| Distance | 61.7 ± 0.1 ly (18.90 ± 0.04 pc) |
| Absolute magnitude (MV) | 3.44[5] |
| Details | |
| Mass | 1.194[6] M☉ |
| Radius | 1.77[2] R☉ |
| Luminosity | 3.7[2] L☉ |
| Surface gravity (log g) | 0.53[3] cgs |
| Temperature | 5,986[2] K |
| Metallicity [Fe/H] | 0.04[6] dex |
| Rotational velocity (v sin i) | 8.1[3] km/s |
| Age | 5.3[6] Gyr |
| Other designations | |
| BD+60°124, GJ 41, HD 5015, HIP 4151, HR 244, SAO 11444, WDS J00531+6107A[7] | |
| Database references | |
| SIMBAD | data |
This object is an F-type star with a stellar classification of F9V.[4] Despite the spectral class, evolutionary models show it to have left the main sequence and is now a subgiant.[2] It is 5.3[6] billion years old and is spinning with a projected rotational velocity of 8 km/s.[3] The star has 1.2[6] times the mass of the Sun and 1.8[2] times the Sun's radius. It is radiating 3.7 times the luminosity of the Sun from its photosphere at an effective temperature of 5,986 K.[2]