21 Ceti is a sub-giant star in the constellation of Cetus.
21 Ceti visual magnitude is 6.16. Because of its reltive faintness, 21 Ceti 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 Ceti:
Celestial coordinates and finder chart of 21 Ceti
21 Ceti 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 Ceti are provided in the following table:
The simplified sky map below shows the position of 21 Ceti in the sky:
Visibility of 21 Ceti from your location
Digitized Sky Survey image of 21 Ceti
The image below is a photograph of 21 Ceti 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 Ceti is 0.018 arcsec per year in Right Ascension and -0.052 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of 21 Ceti from the Sun and relative movement
21 Ceti is distant 379.07 light years from the Sun and it is moving far from the Sun at the speed of 45 kilometers per second.
Spectral properties of 21 Ceti
21 Ceti belongs to spectral class G5 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where 21 Ceti is situated in the Hertzsprung–Russell diagram.