77 Pegasi

77 Pegasi is a variable giant star in the constellation of Pegasus.

77 Pegasi visual magnitude is 5.06. Because of its reltive faintness, 77 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 77 Pegasi:

Color of 77 Pegasi ⬤

Magnitude of 77 Pegasi 5.06

Class Giant

VISIBILITY RIGHT NOW 77 Pegasi is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 77 Pegasi

77 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 77 Pegasi are provided in the following table:

Right Ascension J2000 23h 43m 22s

Declination J2000 +10° 19’ 53”

Galactic Longitude 96.87°

Galactic Latitude -49.06°

Constellation Pegasus

The simplified sky map below shows the position of 77 Pegasi in the sky:

Simplified finder chart for 77 Pegasi.

Visibility of 77 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 77 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: 79.7° RISE 1:26

Max altitude: 48.9° TRANSIT 8:17

Azimuth: 280.3° SET 15:07

RIGHT NOW 77 Pegasi is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 77 Pegasi

The image below is a photograph of 77 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 77 Pegasi is 0.008 arcsec per year in Right Ascension and 0.007 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 77 Pegasi. The red arrow shows the motion of 77 Pegasi during the next 100000 years (13.33 arcmin in Right Ascension and 11.67 arcmin in declination);

Distance of 77 Pegasi from the Sun and relative movement

77 Pegasi is distant 817.04 light years from the Sun and it is moving towards the Sun at the speed of 34 kilometers per second.

Distance (parsec) 250.63 pc

Distance (light year) 817.04 ly

Heliocentric radial velocity -34 km/s

Proper Motion RA 0.008 arcsec/year

Proper Motion Dec 0.007 arcsec/year

Spectral properties of 77 Pegasi

77 Pegasi belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.94

Spectral Type M2III

Color Index (B-V) 1.68

Temperature of 77 Pegasi 3541K

The red dot in the diagram below shows where 77 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 77 Pegasi. Attribution: Richard Powell / CC BY-SA

Alternative designations of 77 Pegasi

Flamsteed designation 77 Pegasi

Henry Draper Catalogue HD222764

SAO Catalogue SAO108789

Hipparcos Catalogue HIP117020

Durchmusterung Catalogue BD+09 5268

FK5 Catalogue 3902

General Catalogue of Variable Stars 14679

In Evidence

Other stars in Pegasus