HD 117939

HD 117939 is a Sun-like star 98 light years (30.23 parsecs) from the Sun. HD 117939 is a G-type star and a near solar twin, It is much old than the sun at 6.1 billion years, compared to the sun at 4.6 billion years old. HD 117939 is found ub the constellation od Centaurus. HD 117939 has a brightness - apparent magnitude of 7.291.

To date no solar twin with an exact match as that of the Sun has been found, however, there are some stars that come very close to being identical to that of the Sun, and are such considered solar twins by the majority of the public. An exact solar twin would be a G2V star with a 5,778K temperature, be 4.6 billion years old, with the correct metallicity and a 0.1% solar luminosity variation. Stars with an age of 4.6 billion years are at the most stable state. Proper metallicity and size are also very important to low luminosity variation.