Yed Prior - δ Ophiuchi (delta Ophiuchi)
Yed Prior, also designated as δ Ophiuchi (delta Ophiuchi), is a variable and double hypergiant star of spectral class M0 in the constellation of Ophiuchus.
Yed Prior visual magnitude is 2.74. Because of its brightness, Yed Prior is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.
Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
Simplified finder chart for Yed Prior - δ Ophiuchi (delta Ophiuchi).
Magnitude, Color, Spectral Class
The red dot in the diagram below shows where Yed Prior is situated in the Hertzsprung–Russell diagram.
Star System Properties
Yed Prior 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 Yed Prior double sysyem:
Distance, Radial Speed, Proper Motion
Yed Prior is distant 170.15 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's Yed Prior - δ Ophiuchi (delta Ophiuchi) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):