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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:50  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Pegasus » 

Algenib - γ Pegasi (gamma Pegasi)

Altitude: -14.7°   Azimuth: 40.0°   Direction: North-East

Algenib, also designated as γ Pegasi (gamma Pegasi), is a variable and multiple sub-giant star in the constellation of Pegasus.

Algenib visual magnitude is 2.83. Thanks to its high brightness, Algenib is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Algenib:


Algenib - γ Pegasi (gamma Pegasi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -14.7°
Azimuth: 40.0°
Direction: North-East

Celestial coordinates and finder chart of Algenib

Algenib 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 Algenib are provided in the following table:

00h 13m 14s
+15° 11’ 00”

The simplified sky map below shows the position of Algenib in the sky:

Finder chart Algenib - γ Pegasi (gamma Pegasi) star
Simplified finder chart for Algenib - γ Pegasi (gamma Pegasi).

Visibility of Algenib 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 Algenib - γ Pegasi (gamma 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: 74.8°
Max altitude: 53.7°
Azimuth: 285.2°

Digitized Sky Survey image of Algenib

The image below is a photograph of Algenib 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 Algenib is 0.003 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Algenib - γ Pegasi (gamma Pegasi) star
DSS2 image of Algenib. The red arrow shows the motion of Algenib during the next 10000 years (0.50 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of Algenib from the Sun and relative movement

Algenib is distant 332.99 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

102.15 pc
332.99 ly
4 km/s
0.003 arcsec/year
-0.012 arcsec/year

Spectral properties of Algenib

Algenib belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


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

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

Algenib star system properties

Algenib 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 Algenib double sysyem:

163.4 arcsec

Alternative designations of Algenib

γ Pegasi
(gamma Pegasi)