21 Comae Berenices
21 Comae Berenices is a variable star in the constellation of Coma Berenices.
21 Comae Berenices visual magnitude is 5.46. Because of its reltive faintness, 21 Comae Berenices should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.
The table below summarizes the key facts about 21 Comae Berenices:
Celestial coordinates and finder chart of 21 Comae Berenices
21 Comae Berenices is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 21 Comae Berenices are provided in the following table:
The simplified sky map below shows the position of 21 Comae Berenices in the sky:
Visibility of 21 Comae Berenices from your location
Location: Greenwich, United Kingdom
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Today's 21 Comae Berenices rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):
Digitized Sky Survey image of 21 Comae Berenices
The image below is a photograph of 21 Comae Berenices from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 21 Comae Berenices is -0.012 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of 21 Comae Berenices from the Sun and relative movement
21 Comae Berenices is distant 310.77 light years from the Sun
Spectral properties of 21 Comae Berenices
21 Comae Berenices belongs to spectral class A2
The red dot in the diagram below shows where 21 Comae Berenices is situated in the Hertzsprung–Russell diagram.