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: 4:43  
clear_day Transit: 12:58  
SunsetSet: 21:12 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Pegasus » 

12 Pegasi

Altitude: 39.5°   Azimuth: 102.9°   Direction: East-South-East

12 Pegasi is a hypergiant star in the constellation of Pegasus.

12 Pegasi visual magnitude is 5.29. Because of its reltive faintness, 12 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 12 Pegasi:


12 Pegasi is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 39.5°
Azimuth: 102.9°
Direction: East-South-East

Celestial coordinates and finder chart of 12 Pegasi

12 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 12 Pegasi are provided in the following table:

21h 46m 04s
+22° 56’ 56”

The simplified sky map below shows the position of 12 Pegasi in the sky:

Finder chart 12 Pegasi star
Simplified finder chart for 12 Pegasi.

Visibility of 12 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 12 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: 67.1°
Max altitude: 61.5°
Azimuth: 292.9°
12 Pegasi is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 12 Pegasi

The image below is a photograph of 12 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 12 Pegasi is 0.01 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 12 Pegasi star
DSS2 image of 12 Pegasi. The red arrow shows the motion of 12 Pegasi during the next 10000 years (1.67 arcmin in Right Ascension and -0.83 arcmin in declination);

Distance of 12 Pegasi from the Sun and relative movement

12 Pegasi is distant 1,128.03 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

346.02 pc
1,128.03 ly
-12 km/s
0.01 arcsec/year
-0.005 arcsec/year

Spectral properties of 12 Pegasi

12 Pegasi belongs to spectral class K0 and has a luminosity class of I corresponding to a hypergiant star.


The red dot in the diagram below shows where 12 Pegasi is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 12 Pegasi. Attribution: Richard Powell / CC BY-SA

Alternative designations of 12 Pegasi