20 Pegasi

Above the horizon. Rise: 14:20 | Tran: 21:26 | Set: 4:37

Alt: 46.73° Az: 217.07° Direction: South-West

20 Pegasi is a double giant star of spectral class F4 in the constellation of Pegasus.

20 Pegasi visual magnitude is 5.6. Because of its faintness, 20 Pegasi is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

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);

Celestial Coordinates

Apparent

Right Ascension 22h 02m 17s

Declination +13° 14’ 23”

Hour Angle 01h 40m 29s

Sidereal Time 23h 42m 46s

J2000

Right Ascension 22h 01m 05s

Declination +13° 07’ 10”

Galactic Coordinates

Galactic Longitude 71.68°

Galactic Latitude -32.32°

Finder Chart

Simplified finder chart for 20 Pegasi.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.6

Class Giant

Absolute magnitude 1.38

Spectral Type F4III

Color Index (B-V) 0.34

Temperature 7217K

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

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

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:

Main star magnitude 5.6

Secondary star magnitude 12

Magnitude difference 6.4

Separation 54.7 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 69.93

Distance (light year) 227.97

Radial Speed 7 km/s

Proper Motion RA 0.059 arcsec/y

Proper Motion Dec -0.057"/y

Alternative Designations

Flamsteed designation 20 Pegasi

Henry Draper Catalogue HD209166

SAO Catalogue SAO107587

Hipparcos Catalogue HIP108693

Durchmusterung Catalogue BD+12 4737

FK5 Catalogue 826

Aitken Double Star Catalogue ADS15543

Visibility from Your Location

Today's 20 Pegasi rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 76.8° RISE 14:20

Max altitude: 51.8° TRANSIT 21:26

Azimuth: 283.2° SET 4:37

Set Location

Other stars in Pegasus