AH Scorpii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Scorpius |
| Right ascension | 17h 11m 17.02114s[1] |
| Declination | −32° 19′ 30.7132″[1] |
| Characteristics | |
| Spectral type | M4-5Ia-Iab[1] |
| B−V color index | 5.57[1] |
| Variable type | Semiregular |
| Astrometry | |
| Radial velocity (Rv) | -13.40 ± 2.4[1] km/s |
| Proper motion (μ) | RA: -1.37[1] mas/yr Dec.: -2.37[1] mas/yr |
| Parallax (π) | -0.09[1] mas |
| Distance | 7,400 ly (2,260[2] pc) |
| Details | |
| Radius | 1,411 ± 124[2] R☉ |
| Luminosity | 330,000[2] L☉ |
| Temperature | 3,682 ± 190[2] K |
| Other designations | |
AH Scorpii, AN 223.1907, GSC 07365-00527, HD 155161, HIP 84071, 2MASS J17111702-3219308, IRC -30282, IRAS 17080-3215, RAFGL 1927[1] | |
| Database references | |
| SIMBAD | data |
AH Scorpii is a red supergiant star located in the constellation Scorpius. One of the largest stars known, AH Sco is estimated at 1,411 solar radii,[2] making it one of the largest stars in its class.
Located approximately 12,000 light-years from Earth, this places it within the Scutum-Centaurus Arm. A luminous red supergiant, it has significant outburst of uncertain variability, at 20% of its luminosity. The size leads to wild estimates because of differences in luminosity, temperature, shrouding gases of dust, and a possibility of a bright companion.
See also
References
- ^ a b c d e f g h i "SIMBAD basic query result: AH Scorpii". SIMBAD, Centre de Données astronomiques de Strasbourg. Retrieved 13 Nov 2013.
- ^ a b c d e Arroyo-Torres, B.; Wittkowski, M.; Marcaide, J. M.; Hauschildt, P. H. (2013). "The atmospheric structure and fundamental parameters of the red supergiants AH Scorpii, UY Scuti, and KW Sagittarii". Astronomy & Astrophysics. 554: A76. arXiv:1305.6179. Bibcode:2013A&A...554A..76A. doi:10.1051/0004-6361/201220920.
