57 Pegasi

57 Pegasi is a variable and double giant star in the constellation of Pegasus.

57 Pegasi visual magnitude is 5.12. Because of its reltive faintness, 57 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 57 Pegasi:

Color of 57 Pegasi ⬤

Magnitude of 57 Pegasi 5.12

Class Giant

VISIBILITY RIGHT NOW 57 Pegasi is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 19°.

Celestial coordinates and finder chart of 57 Pegasi

57 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 57 Pegasi are provided in the following table:

Right Ascension J2000 23h 09m 31s

Declination J2000 +08° 40’ 37”

Galactic Longitude 84.77°

Galactic Latitude -46.51°

Constellation Pegasus

The simplified sky map below shows the position of 57 Pegasi in the sky:

Simplified finder chart for 57 Pegasi.

Visibility of 57 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 57 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: 81.3° RISE 0:53

Max altitude: 47.2° TRANSIT 7:39

Azimuth: 278.7° SET 14:21

RIGHT NOW 57 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 57 Pegasi

The image below is a photograph of 57 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 57 Pegasi is 0.004 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 57 Pegasi. The red arrow shows the motion of 57 Pegasi during the next 100000 years (6.67 arcmin in Right Ascension and 3.33 arcmin in declination);

Distance of 57 Pegasi from the Sun and relative movement

57 Pegasi is distant 761.68 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

Distance (parsec) 233.64 pc

Distance (light year) 761.68 ly

Heliocentric radial velocity 14 km/s

Proper Motion RA 0.004 arcsec/year

Proper Motion Dec 0.002 arcsec/year

Spectral properties of 57 Pegasi

57 Pegasi belongs to spectral class M4 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.72

Spectral Type M4III

Color Index (B-V) 1.47

Temperature of 57 Pegasi 3839K

The red dot in the diagram below shows where 57 Pegasi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 57 Pegasi. Attribution: Richard Powell / CC BY-SA

57 Pegasi star system properties

57 Pegasi is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 57 Pegasi double sysyem:

Main star magnitude 5.12

Secondary star magnitude 10.62

Magnitude difference 5.5

Separation 32.9 arcsec

Alternative designations of 57 Pegasi

Flamsteed designation 57 Pegasi

Henry Draper Catalogue HD218634

SAO Catalogue SAO128001

Hipparcos Catalogue HIP114347

Durchmusterung Catalogue BD+07 4981

General Catalogue of Variable Stars GZ Peg

Aitken Double Star Catalogue ADS16550

In Evidence

Other stars in Pegasus