Variable star in the constellation Scorpius
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! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000.0      Equinox J2000.0
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Spectral type
! style="text-align:left" | U−B 
! style="text-align:left" | B−V 
! style="text-align:left" | Variable type
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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. Parallax measurements yield a distance estimate of approximately from the Sun, and it is drifting further away with a radial velocity of +7 km/s. It has an absolute magnitude of −6.8
This object is a massive supergiant star with a stellar classification of B0.7 Ia. It is an α Cygni variable; 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. The star is around 4.2 million years old and is a member of the Upper Scorpius subgroup of the Sco OB2 association. V1073 Scorpii is considered a "runaway" star, showing a peculiar velocity of more than 37 km/s relative to its neighbourhood. No bow shock has been detected from its motion through interstellar space.
V1073 Sco has a 14th magnitude visual companion, which is an unrelated background object according to its Gaia Data Release 2 parallax.
References.
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