15 Orionis
star system in the constellation Orion,
15 Orionis is a class F2IV[3] (early F-type subgiant) star in the constellation Orion. Its apparent magnitude is 4.82[2] and it is approximately 540 light years away based on parallax.[1] It is the southern pole star of Uranus.
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 09m 41.95770s[1] |
| Declination | 15° 35′ 50.0410″[1] |
| Apparent magnitude (V) | 4.82[2] |
| Characteristics | |
| Spectral type | F2IV[3] |
| U−B color index | +0.19[2] |
| B−V color index | +0.32[2] |
| Astrometry | |
| Radial velocity (Rv) | +28.79[4] km/s |
| Proper motion (μ) | RA: -2.71[1] mas/yr Dec.: -15.75[1] mas/yr |
| Parallax (π) | 6.06 ± 1.97[1] mas |
| Distance | approx. 500 ly (approx. 170 pc) |
| Absolute magnitude (MV) | -0.04[5] |
| Details | |
| Mass | 3.42[6] M☉ |
| Radius | 5.9[7] R☉ |
| Luminosity | 300[6] L☉ |
| Surface gravity (log g) | 3.75[8] cgs |
| Temperature | 7,161[6] K |
| Metallicity [Fe/H] | +0.21[8] dex |
| Rotational velocity (v sin i) | 60[6] km/s |
| Other designations | |
BD+15°752, CCDM J05097+1536AB, GC 6306, HIP 24010, HR 1676, HD 33276, SAO 94359, WDS J05097+1536AB | |
| Database references | |
| SIMBAD | data |
It has one suspected companion, B, at a separation of 0.3".[9]
References
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