ε Persei (epsilon Persei)

Above the horizon. Rise: 3:09 | Tran: 12:22 | Set: 21:38

Alt: 3.54° Az: 35.82° Direction: 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.

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

Right Ascension 03h 59m 33s

Declination +40° 04’ 54”

Hour Angle 15h 19m 04s

Sidereal Time 19h 18m 38s

J2000

Right Ascension 03h 57m 51s

Declination +40° 00’ 37”

Galactic Coordinates

Galactic Longitude 157.35°

Galactic Latitude -10.09°

Finder Chart

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Finder chart for ε Persei (epsilon Persei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 2.89

Class Hypergiant

Absolute magnitude -3.20

Spectral Type B0V

Color Index (B-V) -0.18

Temperature 13121K

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

Main star magnitude 2.89

Secondary star magnitude 7.99

Magnitude difference 5.1

Separation 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.

Distance (parsec) 165.02

Distance (light year) 537.95

Radial Speed 1 km/s

Proper Motion RA 0.018 arcsec/y

Proper Motion Dec -0.026"/y

Alternative Designations

Bayer designation ε Persei
(epsilon Persei)

Flamsteed designation 45 Persei

Henry Draper Catalogue HD24760

SAO Catalogue SAO56840

Hipparcos Catalogue HIP18532

Durchmusterung Catalogue BD+39 895

FK5 Catalogue 147

General Catalogue of Variable Stars Eps Per

Aitken Double Star Catalogue ADS2888

Visibility from Your Location

Today's ε Persei (epsilon Persei) rise, transit and set times from Wheaton, United States are the following (all times relative to the local timezone America/Chicago):

Azimuth: 49.9° RISE 3:09

Max altitude: 88.2° TRANSIT 12:22

Azimuth: 310.1° SET 21:38

Name:	Wheaton, United States
Latitude:	41° 51' 58.0" N
Longitude:	88° 6' 25.2" W
Timezone:	America/Chicago

Set Location

Other stars in Perseus