Diadem - α Comae Berenices (alpha Comae Berenices)
Diadem, also designated as α Comae Berenices (alpha Comae Berenices), is a variable and multiple main-sequence star of spectral class F5 in the constellation of Coma Berenices.
Diadem visual magnitude is 5.22. Because of its faintness, Diadem is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.
Celestial Coordinates
Apparent
J2000
Galactic Coordinates
Finder Chart
Simplified finder chart for Diadem - α Comae Berenices (alpha Comae Berenices).
Magnitude, Color, Spectral Class
The red dot in the diagram below shows where Diadem is situated in the Hertzsprung–Russell diagram.
Star System Properties
Diadem 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 Diadem double sysyem:
Distance, Radial Speed, Proper Motion
Diadem is distant 46.70 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's Diadem - α Comae Berenices (alpha Comae Berenices) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):