HD 93250
HD 93250 is the bright star just above and left of the centre of this image of the Carina Nebula, directly above the Keyhole Nebula. Credit: ESO | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Carina |
| Right ascension | 10h 44m 45.028s |
| Declination | −59° 33′ 54.68″ |
| Apparent magnitude (V) | 7.41 |
| Characteristics | |
| Spectral type | O4 IV(fc) |
| U−B color index | −0.85 |
| B−V color index | +0.17 |
| Astrometry | |
| Radial velocity (Rv) | 11.6 km/s |
| Proper motion (μ) | RA: −7.116 mas/yr Dec.: +3.081 mas/yr |
| Parallax (π) | 0.4115±0.0199 mas |
| Distance | 7,900 ± 400 ly (2,400 ± 100 pc) |
| Absolute magnitude (MV) | −6.14 |
| Orbit | |
| Period (P) | 194.31±0.39 d |
| Semi-major axis (a) | 1.224±0.028 mas |
| Eccentricity (e) | 0.217±0.011 |
| Inclination (i) | 22±41° |
| Longitude of the node (Ω) | 59±20° |
| Argument of periastron (ω) (secondary) | 171±24° |
| Details | |
| Radius | 15.9 R☉ |
| Luminosity | 1,000,000 L☉ |
| Surface gravity (log g) | 3.96 cgs |
| Temperature | 46,000 K |
| Rotational velocity (v sin i) | 130 km/s |
| Age | 1.3 Myr |
| A | |
| Mass | 49 M☉ |
| Other designations | |
| 1E 104248-5918.0, XMMU J104444.8-593354, ALS 1859, 2E 2317, HIP 52558, CD-58°3537, GC 14791, CGO 246, GCRV 25947, PPM 339400, Trumpler 16 180, SAO 238423, Trumpler 14 101, TYC 8626-2075-1, CPC 20°3140, GOS G287.51-00.54 01, CPD−58°2661, GSC 08626-02075 | |
| Database references | |
| SIMBAD | data |
HD 93250 is a highly luminous hot blue binary star in the Carina Nebula in the constellation Carina.