Omicron Geminorum

It is faintly visible to the naked eye with an apparent visual magnitude of 4.90.

[2] Based upon an annual parallax shift of 19.61 mas,[1] it is located at a distance of 166 light-years from the Sun.

[10] It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).

[3] The measured angular diameter is 0.68±0.03 mas,[14] which, at its estimated distance, yields a physical size of about 3.7 times the radius of the Sun.

[6] It radiates approximately 24 times the solar luminosity from an outer atmosphere at an effective temperature of 6,309 K.[7]