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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:06 
Transit: 12:56 
Sunset: 20:47
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All Constellations » Perseus » 

ε Persei (epsilon Persei)

Above the horizon.  Circumpolar today
Alt: 6.55°   Az: 333.68°   Direction: North-North-West

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.

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);

Celestial Coordinates

Apparent

03h 59m 33s
+40° 04’ 53”
09h 39m 25s
13h 38m 59s

J2000

03h 57m 51s
+40° 00’ 37”

Galactic Coordinates

157.35°
-10.09°

Finder Chart

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Finder chart for ε Persei (epsilon Persei).

Magnitude, Color, Spectral Class

2.89
Hypergiant

-3.20
B0V
13121K

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

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:

2.89
7.99
5.1
8.8 arcsec

Distance, Radial Speed, Proper Motion

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
537.95
1 km/s
0.018 arcsec/y
-0.026"/y

Alternative Designations

ε Persei
(epsilon Persei)
SAO56840
SAO56840

Visibility from Your Location

ε Persei (epsilon Persei) is circumpolar and transits at 12:17 UTC (altitude: 78.6°)