KIC 11145123

KIC 11145123 (sometimes mistakenly called Kepler 1145123 ), is a white hued star located in the northern constellation Cygnus, the swan. It has an apparent magnitude of 13.12, making it readily visible in large telescopes, but not to the naked eye. The object is located relatively far at a distance of approximately 3,910 light years, but is rapidly approaching the Solar System with a radial velocity of $$.

Characteristics
KIC 11145123 has a spectral classification of F7V, indicating that it is a main sequence F-type star. Atmospheric models suggest it may be hotter and possibly a late A-type star. It has 1.4 times the mass of the Sun, in contrast to the 1.7 times that would be expected from a normal late A main sequence star, and 1.57 times its radius. It radiates 12 times the luminosity of the Sun from its photosphere at an effective temperature of $$. Unlike most hot stars, KIC 11145123 spins exceptionally slowly with a projected rotational velocity of $$. This corresponds to a period of roughly 100 days. Despite appearing as a main sequence star (Gaia DR3 models it as such), it is most likely a blue straggler.

Roundest natural object
KIC 11145123 is currently believed be the roundest natural object, with the difference between equatorial and polar radii equaling a mere three kilometers.