V1073 Scorpii is a variable star in the constellation Scorpius. It has a non-Greek Bayer designation of k Scorpii. The star has a blue-white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around +4.87.[2] Parallax measurements yield a distance estimate of approximately 2,920ly (896pc) from the Sun, and it is drifting further away with a radial velocity of +7km/s.[5] It has an absolute magnitude of −6.8[6]
A light curve for V1073 Scorpii, adapted from Lefèvre et al. (2009)[11]
Variable star in the constellation Scorpius
This article is about k Scorpii. It is not to be confused with κ (kappa) Scorpii.
This object is a massive supergiant star with a stellar classification of B0.7 Ia.[3] It is an α Cygni variable;[12] a supergiant that pulsates erratically on a timescale of days to weeks with an amplitude of less than a tenth of a magnitude. A simplistic fitting of Hipparcos data suggests a periodicity of 1.6 days.[13][11] The star is around 4.2[8]million years old and is a member of the Upper Scorpius subgroup of the Sco OB2 association.[14] V1073 Scorpii is considered a "runaway" star, showing a peculiar velocity of more than 37km/s relative to its neighbourhood.[8] No bow shock has been detected from its motion through interstellar space.[15]
V1073 Sco has a 14th magnitude visual companion,[16] which is an unrelated background object according to its Gaia Data Release 2 parallax.[17]
Ducati, J. R. (2002). "Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
Samus, N. N.; Durlevich, O. V.; etal. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
Kharchenko, N. V.; etal. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations". Astronomische Nachrichten. 328 (9): 889. arXiv:0705.0878. Bibcode:2007AN....328..889K. doi:10.1002/asna.200710776. S2CID119323941.
Fraser, M.; etal. (2010). "Atmospheric parameters and rotational velocities for a sample of Galactic B-type supergiants". Monthly Notices of the Royal Astronomical Society. 404 (3): 1306. arXiv:1001.3337. Bibcode:2010MNRAS.404.1306F. doi:10.1111/j.1365-2966.2010.16392.x. S2CID118674151.
Kazarovets, E. V.; etal. (1999). "The 74th Special Name-list of Variable Stars". Information Bulletin on Variable Stars. 4659: 1. Bibcode:1999IBVS.4659....1K.
Brown, A.G.A.; Verschueren, W. (1997). "High S/N Echelle spectroscopy in young stellar groups. II. Rotational velocities of early-type stars in SCOOB2". Astronomy and Astrophysics. 319: 811. arXiv:astro-ph/9608089. Bibcode:1997A&A...319..811B.
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