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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 12:59 
Sunset: 21:16
sunny   (Daytime)   What's Visible Now?

ε Persei (epsilon Persei)

Above the horizon.  Circumpolar today
Altitude: 30.6°   Azimuth: 62.9°   Direction: East-North-East

ε Persei is a variable and multiple hypergiant star of spectral class B0 in the constellation of Perseus.

ε Persei visual magnitude is 2.89. Because of its brightness, ε Persei is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Celestial coordinates and finder chart of ε Persei

Finder chart ε Persei (epsilon Persei) star
Simplified finder chart for ε Persei (epsilon Persei).

ε 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 ε Persei are provided in the following table:

03h 57m 51s
+40° 00’ 37”
Image of ε Persei (epsilon Persei) star
DSS2 image of ε Persei. The red arrow shows the motion of ε Persei during the next 10000 years (3.00 arcmin in Right Ascension and -4.33 arcmin in declination);

Key facts about ε Persei


and has a luminosity class of V corresponding to a hypergiant star.


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

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

ε Persei star system properties

ε Persei is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the ε Persei double sysyem:

8.8 arcsec

Distance of ε Persei from the Sun and relative movement

ε Persei is distant 537.95 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

165.02 pc
537.95 ly
1 km/s
0.018 arcsec/year
-0.026 arcsec/year

Alternative designations of ε Persei

ε Persei
(epsilon Persei)

Visibility of ε Persei from your location

ε Persei (epsilon Persei) is circumpolar and transits at 10:21 UTC (altitude: 78.5°)