Omega_Geminorum
Omega Geminorum
Star in the constellation Gemini
Omega Geminorum, Latinized from ω Geminorum, is a star located in the middle of the northern zodiac constellation of Gemini. With an apparent visual magnitude of 5.18,[2] it is faintly visible to the naked eye. According to the Bortle scale, it can be viewed from dark suburban skies. With an annual parallax shift of just 2.19 mas,[1] it is located about 1,500 light years from the Sun.
This is an evolved bright giant star with a stellar classification of G5 II.[3] It is positioned near the instability strip and in 1977 was listed as a candidate cepheid variable star[12] with a luminosity amplitude of 0.086 and a period of 0.7282 days.[4] The interferometer-measured angular diameter of this star is 1.47±0.21 mas.[13] At its estimated distance, this yields a physical size of about 72 times the radius of the Sun.[7] It has 6.3[3] times the mass of the Sun and radiates 1,813[8] times the solar luminosity from its outer atmosphere at an effective temperature of 5,090 K.[9]