Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

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:

5.12
Giant
57 Pegasi is above the horizon from Greenwich, United Kingdom [change]. Altitude: 45°.

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:

23h 09m 31s
+08° 40’ 37”
84.77°
-46.51°
Pegasus

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

Finder chart 57 Pegasi star
Simplified finder chart for 57 Pegasi.

Visibility of 57 Pegasi from your location

Location: Greenwich, United Kingdom [change]
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 [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.3°
Max altitude: 47.2°
Azimuth: 278.7°
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.

Image of 57 Pegasi star
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.

233.64 pc
761.68 ly
14 km/s
0.004 arcsec/year
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.

-1.72
M4III
3839K

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

HR 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:

5.12
10.62
5.5
32.9 arcsec

Alternative designations of 57 Pegasi

SAO128001
SAO128001