Sigma Scorpii
variable star in the constellation Scorpius
Sigma Scorpii (officially known as Alniyat) is a multiple star system in the constellation of Scorpius. It is located near the brighter red supergiant star Antares. The star system has a combined apparent visual magnitude of +2.88,[1] making it one of the brighter stars of the constellation. According to the parallax measurements that were made during the Hipparcos mission, the distance to Alniyat is about 696 light years.[2] North et al. (2007) calculated a more accurate distance of 568 light years or 509 to 643 light years.[3]
References
change- ↑ Johnson, H. L.; et al. (1966). "UBVRIJKL photometry of the bright stars". Communications of the Lunar and Planetary Laboratory. 4 (99): 99. Bibcode:1966CoLPL...4...99J.
- ↑ van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- ↑ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x, S2CID 118629873
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