Rasalgethi - α1 Herculis (alpha1 Herculis)
Rasalgethi, also designated as α1 Herculis (alpha1 Herculis), is a variable and multiple supergiant star of spectral class M5 in the constellation of Hercules.
Rasalgethi visual magnitude is 3.48. Because of its moderate brightness, Rasalgethi 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 Rasalgethi is situated in the Hertzsprung–Russell diagram.
Star System Properties
Rasalgethi is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Rasalgethi double sysyem:
Distance, Radial Speed, Proper Motion
Rasalgethi is distant 382.18 light years from the Sun and it is moving towards the Sun at the speed of 33 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's Rasalgethi - α1 Herculis (alpha1 Herculis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):