21 Pegasi is a main-sequence star in the constellation of Pegasus.
21 Pegasi visual magnitude is 5.8. Because of its reltive faintness, 21 Pegasi 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 Pegasi:
Celestial coordinates and finder chart of 21 Pegasi
21 Pegasi 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 Pegasi are provided in the following table:
The simplified sky map below shows the position of 21 Pegasi in the sky:
Visibility of 21 Pegasi from your location
Digitized Sky Survey image of 21 Pegasi
The image below is a photograph of 21 Pegasi 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 Pegasi is 0.017 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of 21 Pegasi from the Sun and relative movement
21 Pegasi is distant 540.63 light years from the Sun
Spectral properties of 21 Pegasi
21 Pegasi belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.
The red dot in the diagram below shows where 21 Pegasi is situated in the Hertzsprung–Russell diagram.