θ Ophiuchi (theta Ophiuchi)
θ Ophiuchi is a variable and double sub-giant star of spectral class B2 in the constellation of Ophiuchus.
θ Ophiuchi visual magnitude is 3.27. Because of its moderate brightness, θ Ophiuchi 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 Ophiuchi is situated in the Hertzsprung–Russell diagram.
Star System Properties
θ Ophiuchi 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 Ophiuchi double sysyem:
Distance, Radial Speed, Proper Motion
θ Ophiuchi is distant 563.04 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's θ Ophiuchi (theta Ophiuchi) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):