Tags: Star.
Omicron1 Centauri (ο1 Cen ο1 Centauri) is a star in the constellation Centaurus. It is approximately 6000 light years from Earth.ο1 Centauri is a yellow G-type supergiant with a mean apparent magnitude of +5.07. It is classified as a semiregular variable star and its brightness varies from magnitude +5.8 to +6.6 with a period of 200 days.