AH Scorpii
Star in the constellation Scorpius / From Wikipedia, the free encyclopedia
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AH Scorpii (abbreviated to AH Sco) is a red supergiant variable star located in the constellation Scorpius. It is one of the largest stars known by radius and is also one of the most luminous red supergiant stars in the Milky Way.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Scorpius |
Right ascension | 17h 11m 17.01945s[1] |
Declination | −32° 19′ 30.7140″[1] |
Apparent magnitude (V) | 6.5 - 9.6[2] |
Characteristics | |
Spectral type | M4-5 Ia-Iab[3] |
B−V color index | +2.57[4] |
Variable type | SRc[3] |
Astrometry | |
Radial velocity (Rv) | −13.40±2.4[5] km/s |
Proper motion (μ) | RA: −2.322±0.115[1] mas/yr Dec.: −2.610±0.068[1] mas/yr |
Parallax (π) | 0.5632 ± 0.0799 mas[1] |
Distance | 7,400±620 ly (2,260±190[6] pc) |
Absolute magnitude (MV) | −5.8[7] |
Details | |
Mass | 20[8] M☉ |
Radius | 1,411±124[4] R☉ |
Luminosity | 330,000+270,000 −150,000[4] L☉ |
Surface gravity (log g) | −0.5[4] cgs |
Temperature | 3,682[4] K |
Other designations | |
Database references | |
SIMBAD | data |
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