σ Pegasi (sigma Pegasi)
σ Pegasi is a double sub-giant star in the constellation of Pegasus.
σ Pegasi visual magnitude is 5.16. Because of its reltive faintness, σ 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 σ Pegasi:
Celestial coordinates and finder chart of σ Pegasi
σ 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 σ Pegasi are provided in the following table:
The simplified sky map below shows the position of σ Pegasi in the sky:
Visibility of σ Pegasi from your location
Digitized Sky Survey image of σ Pegasi
The image below is a photograph of σ 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 σ Pegasi is 0.522 arcsec per year in Right Ascension and 0.044 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of σ Pegasi from the Sun and relative movement
σ Pegasi is distant 87.52 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.
Spectral properties of σ Pegasi
σ Pegasi belongs to spectral class F7 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where σ Pegasi is situated in the Hertzsprung–Russell diagram.
σ Pegasi star system properties
σ Pegasi 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 σ Pegasi double sysyem: