θ Hydrae (theta Hydrae)
θ Hydrae is a variable and multiple main-sequence star of spectral class B9 in the constellation of Hydra.
θ Hydrae visual magnitude is 3.88. Because of its moderate brightness, θ Hydrae is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.
Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
Magnitude, Color, Spectral Class
The red dot in the diagram below shows where θ Hydrae is situated in the Hertzsprung–Russell diagram.
Star System Properties
θ Hydrae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the θ Hydrae double sysyem:
Distance, Radial Speed, Proper Motion
θ Hydrae is distant 128.65 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's θ Hydrae (theta Hydrae) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):