Theta Hydrae
Star
Theta Hydrae, Latinized from θ Hydrae, is a binary star system in the constellation Hydra. It is visible to the naked eye with an apparent visual magnitude of 3.9. The star system has a high proper motion with an annual parallax shift of 28.4 mas,... Wikipedia
Magnitude: 3.888
Constellation: Hydra
B−V color index: −0.065
Surface gravity (log g): 3.80±0.08 cgs
U−B color index: −0.118