η Serpentis (eta Serpentis)
η Serpentis is a variable and double hypergiant star of spectral class K0 in the constellation of Serpens.
η Serpentis visual magnitude is 3.26. Because of its moderate brightness, η Serpentis 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 η Serpentis is situated in the Hertzsprung–Russell diagram.
Star System Properties
η Serpentis 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 η Serpentis double sysyem:
Distance, Radial Speed, Proper Motion
η Serpentis is distant 61.73 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.
Alternative Designations
Visibility from Your Location
Today's η Serpentis (eta Serpentis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):