1 Scorpii
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Scorpius |
| Right ascension | 15h 50m 58.745s |
| Declination | −25° 45′ 04.66″ |
| Apparent magnitude (V) | +4.638 |
| Characteristics | |
| Spectral type | B1.5Vn |
| U−B color index | -0.73 |
| B−V color index | -0.06 |
| Variable type | Gamma Cassiopeiae[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | -3.00 km/s |
| Proper motion (μ) | RA: -14.20 ± 0.33 mas/yr Dec.: -25.12 ± 0.26 mas/yr |
| Parallax (π) | 6.59 ± 0.27 mas |
| Distance | 490 ± 20 ly (152 ± 6 pc) |
| Absolute magnitude (MV) | -1.38 |
| Details | |
| Mass | 10.3[1] M☉ |
| Radius | 3.7[1] R☉ |
| Luminosity | 3,890[1] L☉ |
| Temperature | 24,000[1] K |
| Rotational velocity (v sin i) | +310[2] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
1 Scorpii is a star in the constellation of Scorpius. This star has an apparent magnitude of 4.63. It rotates extremely rapidly, is severely oblate, and due to this is a small amplitude variable star.
References
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