Omicron2 Centauri
Omicron2 Centauri is a star in the southern constellation Centaurus. Its name is a Bayer designation that is Latinied from ο2 Centauri, and abbreviated Omicron2 Cen or ο2 Cen. This star is visible to the naked eye with a mean apparent [visual magnitude] of +5.12. Based on parallax measurements, it is located at a distance of approximately 7,000 light years from Earth.
ο2 Centauri is a white A-type blue supergiant. It is classified as an Alpha Cygni type variable star and its brightness varies from magnitude +5.12 to +5.22 with a period of 46.3 days. In 1996, Kaufer and colleagues calculated Omicron2 Centauri to be around 136,000 times as luminous, 18 times as massive and have 131 times the diameter of the Sun.
ο2 Cen forms a close naked eye pair with ο1 Cen, another 5th magnitude supergiant. Both stars are located between Crux and the brightest yellow hypergiant in the sky, V382 Carinae.