HR 4699
Star in the constellation Corvus
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HR 4699 is a single[11] star in the southern constellation of Corvus. It is orange in hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.14.[2] This star is located at a distance of approximately 201 light years from the Sun based on parallax.[1] It is drifting further away with a radial velocity of +14 km/s, after come to within 45.1 light-years some four million years ago.[2]
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Corvus |
| Right ascension | 12h 20m 55.71287s[1] |
| Declination | –13° 33′ 56.6100″[1] |
| Apparent magnitude (V) | +5.14[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B color index | +0.93[4] |
| B−V color index | +1.048±0.003[2] |
| Astrometry | |
| Radial velocity (Rv) | +14.0±0.7[2] km/s |
| Proper motion (μ) | RA: –4.93[1] mas/yr Dec.: +9.86[1] mas/yr |
| Parallax (π) | 16.21±0.29 mas[1] |
| Distance | 201 ± 4 ly (62 ± 1 pc) |
| Absolute magnitude (MV) | 1.18[2] |
| Details | |
| Mass | 1.76[5] M☉ |
| Radius | 9.92+0.11 −0.16[6] R☉ |
| Luminosity | 43±1[6] L☉ |
| Surface gravity (log g) | 3.01[7] cgs |
| Temperature | 4,707+38 −27[6] K |
| Metallicity [Fe/H] | 0.00±0.05[8] dex |
| Rotational velocity (v sin i) | 0.0[9] km/s |
| Age | 1.97[5] Gyr |
| Other designations | |
| BD–12°3614, HD 107418, HIP 60221, HR 4699, SAO 157226[10] | |
| Database references | |
| SIMBAD | data |
This is an aging giant star with a stellar classification of K0 III,[3] having exhausted the supply of hydrogen at its core then cooled and expanded to almost ten[6] times the Sun's radius. It is nearly two[5] billion years old with 1.76 times the mass of the Sun.[5] The star is radiating 43 times the luminosity of the Sun from its photosphere at an effective temperature of 4,707 K.[6]