HD 166066 is a solitary star located in the southern circumpolar constellation Octans.
It has an apparent magnitude of 8.10,[2] making it readily visible in binoculars, but not to the naked eye.
The object is located 223 light years away from the Solar System,[1] but is drifting away with a poorly constrained radial velocity of about 2.93 km/s.
[4] HD 166066 has a stellar classification of G0 V, indicating that it is a G-type main sequence star similar to the Sun.
[5][7] The iron abundance is 93% that of the Sun, and is slightly hotter, with an effective temperature of 6,054 K[6] compared to the Sun's 5,778 K. HD 166066 is significantly older, with an age of 7 billion years,[9] and rotates modestly with a projected rotational velocity of 5 km/s.