Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:49  
clear_day Transit: 12:56  
SunsetSet: 21:04 south
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All Constellations » Pegasus » 

20 Pegasi

20 Pegasi is a double giant star in the constellation of Pegasus.

20 Pegasi visual magnitude is 5.6. Because of its reltive faintness, 20 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 20 Pegasi:

20 Pegasi is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of 20 Pegasi

20 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 20 Pegasi are provided in the following table:

22h 01m 05s
+13° 07’ 10”

The simplified sky map below shows the position of 20 Pegasi in the sky:

Finder chart 20 Pegasi star
Simplified finder chart for 20 Pegasi.

Visibility of 20 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 20 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: 76.9°
Max altitude: 51.6°
Azimuth: 283.1°
20 Pegasi is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 20 Pegasi

The image below is a photograph of 20 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 20 Pegasi is 0.059 arcsec per year in Right Ascension and -0.057 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 20 Pegasi star
DSS2 image of 20 Pegasi. The red arrow shows the motion of 20 Pegasi during the next 10000 years (9.83 arcmin in Right Ascension and -9.50 arcmin in declination);

Distance of 20 Pegasi from the Sun and relative movement

20 Pegasi is distant 227.97 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

69.93 pc
227.97 ly
7 km/s
0.059 arcsec/year
-0.057 arcsec/year

Spectral properties of 20 Pegasi

20 Pegasi belongs to spectral class F4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 20 Pegasi is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 20 Pegasi. Attribution: Richard Powell / CC BY-SA

20 Pegasi star system properties

20 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 20 Pegasi double sysyem:

54.7 arcsec

Alternative designations of 20 Pegasi