Omicron Geminorum

Omicron Geminorum (ο Gem) is a solitary star in the constellation Gemini. It is faintly visible to the naked eye with an apparent visual magnitude of 4.90. Based upon an annual parallax shift of 19.61 mas, it is located at a distance of 166 light years from the Sun.

This is an F-type giant star with a stellar classification of F3 III. The measured angular diameter is 6999680000000000000♠0.68±0.03 mas, which, at its estimated distance, yields a physical size of about 3.7 times the radius of the Sun. It radiates approximately 24 times the solar luminosity from an outer atmosphere at an effective temperature of 6,309 K.