V1073 Scorpii
From Infogalactic: the planetary knowledge core
 Location of V1073 Scorpii (circled) |
|
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 04m 49.35227s[1] |
| Declination | −34° 07′ 22.5483″[1] |
| Apparent magnitude (V) | +4.87[2] |
| Characteristics | |
| Spectral type | B0.7 Ia[3] |
| U−B color index | −0.69[2] |
| B−V color index | +0.26[2] |
| Variable type | α Cyg[4] |
| Astrometry | |
| Radial velocity (Rv) | 7.00[5] km/s |
| Proper motion (μ) | RA: −1.60 ± 0.33[1] mas/yr Dec.: −3.28 ± 0.23[1] mas/yr |
| Parallax (π) | 0.70 ± 0.29[1] mas |
| Distance | 2,510[6] pc |
| Absolute magnitude (MV) | −6.8[7] |
| Details | |
| Mass | 23[8] M☉ |
| Radius | 36.0[7] R☉ |
| Luminosity | 302,000[7] L☉ |
| Surface gravity (log g) | 2.70[8] cgs |
| Temperature | 22,500[7] K |
| Rotational velocity (v sin i) | 47[8] km/s |
| Age | 4.2[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
V1073 Scorpii (V1073 Sco) is a variable star in the constellation Scorpius. It also has a non-Greek Bayer designation of k Scorpii.
V1073 Sco has a 14th magnitude companion.[10]
V1073 Sco is an α Cygni variable,[11] a supergiant which pulsates erratically on a timescale of days to weeks. The mean visual magnitude is 4.87 and its brightness changes at most by less than a tenth of a magnitude. A simplistic fitting of Hipparcos data suggests a periodicity of 1.6 days.[12][13]
V1073 Scorpii is a runaway star, moving at more than 37 km/s relative to its neighbourhood.[9] No bow shock has been detected.[14]
References
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