74 Orionis
Single star in the constellation Orion
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74 Orionis is a single[10] star in the equatorial constellation of Orion. It has the Bayer designation k Orionis, while 74 Orionis is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-white hued point of light with an apparent visual magnitude of 5.04.[2] It is located at a distance of 64 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +9 km/s.[5] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.204 arc seconds per annum.[11]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 06h 16m 26.61911s[1] |
| Declination | +12° 16′ 19.7876″[1] |
| Apparent magnitude (V) | 5.04[2] |
| Characteristics | |
| Evolutionary stage | main sequence[1] |
| Spectral type | F5V[3] |
| U−B color index | −0.02[4] |
| B−V color index | +0.42[4] |
| Astrometry | |
| Radial velocity (Rv) | +9.17[5] km/s |
| Proper motion (μ) | RA: +82.775[1] mas/yr Dec.: +186.480[1] mas/yr |
| Parallax (π) | 51.0518±0.0969 mas[1] |
| Distance | 63.9 ± 0.1 ly (19.59 ± 0.04 pc) |
| Absolute magnitude (MV) | 3.62[2] |
| Details | |
| Mass | 1.39[6] M☉ |
| Radius | 1.3[7] R☉ |
| Luminosity | 3.02[2] L☉ |
| Surface gravity (log g) | 4.34[6] cgs |
| Temperature | 6,595[6] K |
| Metallicity [Fe/H] | −0.03[2] dex |
| Rotational velocity (v sin i) | 18.8[8] km/s |
| Age | 2.316[6] Gyr |
| Other designations | |
| k Ori, 74 Ori, BD+12°1084, FK5 1169, GC 8033, GJ 9207, HD 43386, HIP 29800, HR 2241, SAO 95476, CCDM J06165+1216A, WDS J06164+1216A, LTT 11823[9] | |
| Database references | |
| SIMBAD | data |
This object is an ordinary F-type main-sequence star with a stellar classification of F5V.[3] It is an estimated 2.3[6] billion years old and is spinning with a projected rotational velocity of 18.8 km/s.[8] The star has 1.4[6] times the mass of the Sun and 1.3[7] times the Sun's radius. Metallicity is near solar,[2] which indicates it has a Sun-like abundance of elements. The star is radiating three[2] times the luminosity of the Sun from its photosphere at an effective temperature of 6,595 K.[6]
74 Orionis has two visual companions: component B, with magnitude 12.5 and separation 32.1", and C, with magnitude 9.0 and separation 195.5".[12]