We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Civil TwilightWhat's Visible Now?
All Constellations » Perseus » 

γ Persei (gamma Persei)

Altitude: 20.0°   Azimuth: 336.4°   Direction: North-North-West

γ Persei is a multiple giant star in the constellation of Perseus.

γ Persei visual magnitude is 2.93. Thanks to its high brightness, γ Persei 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 γ Persei:


γ Persei (gamma Persei) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 20.0°
Azimuth: 336.4°
Direction: North-North-West

Celestial coordinates and finder chart of γ Persei

γ Persei is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of γ Persei are provided in the following table:

03h 04m 47s
+53° 30’ 23”

The simplified sky map below shows the position of γ Persei in the sky:

Finder chart γ Persei (gamma Persei) star
Simplified finder chart for γ Persei (gamma Persei).

Visibility of γ Persei from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

γ Persei (gamma Persei) is circumpolar and transits at 22:14 UTC (altitude: 88.0°)

Digitized Sky Survey image of γ Persei

The image below is a photograph of γ Persei 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 γ Persei is 0 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of γ Persei (gamma Persei) star
DSS2 image of γ Persei. The red arrow shows the motion of γ Persei during the next 100000 years (0.00 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of γ Persei from the Sun and relative movement

γ Persei is distant 256.29 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

78.62 pc
256.29 ly
3 km/s
-0.005 arcsec/year

Spectral properties of γ Persei

γ Persei belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


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

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

γ Persei star system properties

γ Persei 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 γ Persei double sysyem:

57 arcsec

Alternative designations of γ Persei

γ Persei
(gamma Persei)