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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
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All Constellations » Pegasus » 

Alkarab - υ Pegasi (upsilon Pegasi)

Altitude: -14.2°   Azimuth: 12.4°   Direction: North-North-East

Alkarab, also designated as υ Pegasi (upsilon Pegasi), is a giant star in the constellation of Pegasus.

Alkarab visual magnitude is 4.4. Because of its moderate brightness, Alkarab should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Alkarab:


Alkarab - υ Pegasi (upsilon Pegasi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -14.2°
Azimuth: 12.4°
Direction: North-North-East

Celestial coordinates and finder chart of Alkarab

Alkarab 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 Alkarab are provided in the following table:

23h 25m 22s
+23° 24’ 15”

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

Finder chart Alkarab - υ Pegasi (upsilon Pegasi) star
Simplified finder chart for Alkarab - υ Pegasi (upsilon Pegasi).

Visibility of Alkarab 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 Alkarab - υ Pegasi (upsilon 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: 66.6°
Max altitude: 61.9°
Azimuth: 293.4°

Digitized Sky Survey image of Alkarab

The image below is a photograph of Alkarab 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 Alkarab is 0.193 arcsec per year in Right Ascension and 0.037 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Alkarab - υ Pegasi (upsilon Pegasi) star
DSS2 image of Alkarab. The red arrow shows the motion of Alkarab during the next 1000 years (3.22 arcmin in Right Ascension and 0.62 arcmin in declination);

Distance of Alkarab from the Sun and relative movement

Alkarab is distant 173.13 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

53.11 pc
173.13 ly
-11 km/s
0.193 arcsec/year
0.037 arcsec/year

Spectral properties of Alkarab

Alkarab belongs to spectral class F8 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of Alkarab

υ Pegasi
(upsilon Pegasi)