31 Pegasi

31 Pegasi is a variable sub-giant star in the constellation of Pegasus.

31 Pegasi visual magnitude is 5.01. Because of its reltive faintness, 31 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 31 Pegasi:

Color of 31 Pegasi ⬤

Magnitude of 31 Pegasi 5.01

Class Sub-giant

VISIBILITY RIGHT NOW 31 Pegasi is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 48°.

Celestial coordinates and finder chart of 31 Pegasi

31 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 31 Pegasi are provided in the following table:

Right Ascension J2000 22h 21m 31s

Declination J2000 +12° 12’ 19”

Galactic Longitude 75.27°

Galactic Latitude -36.43°

Constellation Pegasus

The simplified sky map below shows the position of 31 Pegasi in the sky:

Simplified finder chart for 31 Pegasi.

Visibility of 31 Pegasi from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 31 Pegasi rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 77.8° RISE 23:46

Max altitude: 50.7° TRANSIT 6:51

Azimuth: 282.2° SET 13:52

RIGHT NOW 31 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 31 Pegasi

The image below is a photograph of 31 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 31 Pegasi is 0.009 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 31 Pegasi. The red arrow shows the motion of 31 Pegasi during the next 100000 years (15.00 arcmin in Right Ascension and 10.00 arcmin in declination);

Distance of 31 Pegasi from the Sun and relative movement

31 Pegasi is distant 970.24 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

Distance (parsec) 297.62 pc

Distance (light year) 970.24 ly

Heliocentric radial velocity 10 km/s

Proper Motion RA 0.009 arcsec/year

Proper Motion Dec 0.006 arcsec/year

Spectral properties of 31 Pegasi

31 Pegasi belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -2.36

Spectral Type B2IV

Color Index (B-V) -0.13

Temperature of 31 Pegasi 12103K

The red dot in the diagram below shows where 31 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 31 Pegasi. Attribution: Richard Powell / CC BY-SA

Alternative designations of 31 Pegasi

Flamsteed designation 31 Pegasi

Henry Draper Catalogue HD212076

SAO Catalogue SAO107854

Hipparcos Catalogue HIP110386

Durchmusterung Catalogue BD+11 4784

FK5 Catalogue 843

General Catalogue of Variable Stars IN Peg

In Evidence

Other stars in Pegasus