σ Pegasi (sigma Pegasi)

Below the horizon. Rise: 22:58 | Tran: 5:51 | Set: 12:39

Alt: -2.87° Az: 70.04° Direction: South-West

σ Pegasi is a double sub-giant star of spectral class F7 in the constellation of Pegasus.

σ Pegasi visual magnitude is 5.16. Because of its faintness, σ 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 σ Pegasi. The red arrow shows the motion of σ Pegasi during the next 1000 years (8.70 arcmin in Right Ascension and 0.73 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 22h 53m 40s

Declination +09° 58’ 16”

Hour Angle 16h 49m 35s

Sidereal Time 15h 43m 15s

J2000

Right Ascension 22h 52m 24s

Declination +09° 50’ 08”

Galactic Coordinates

Galactic Longitude 80.87°

Galactic Latitude -43.1°

Finder Chart

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Finder chart for σ Pegasi (sigma Pegasi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.16

Class Sub-giant

Absolute magnitude 3.02

Spectral Type F7IV

Color Index (B-V) 0.48

Temperature 6481K

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

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

Star System Properties

σ 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 σ Pegasi double sysyem:

Main star magnitude 5.16

Secondary star magnitude 13.56

Magnitude difference 8.4

Separation 248 arcsec

Distance, Radial Speed, Proper Motion

σ Pegasi is distant 87.52 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

Distance (parsec) 26.85

Distance (light year) 87.52

Radial Speed 12 km/s

Proper Motion RA 0.522 arcsec/y

Proper Motion Dec 0.044"/y

Alternative Designations

Bayer designation σ Pegasi
(sigma Pegasi)

Flamsteed designation 49 Pegasi

Henry Draper Catalogue HD216385

SAO Catalogue SAO127810

Hipparcos Catalogue HIP112935

Durchmusterung Catalogue BD+09 5122

Gliese Catalogue Wo 9801 A

FK5 Catalogue 3828

Visibility from Your Location

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

Azimuth: 80.0° RISE 22:58

Max altitude: 48.5° TRANSIT 5:51

Azimuth: 280.0° SET 12:39

Set Location

Other stars in Pegasus