ε Cephei (epsilon Cephei)

Above the horizon. Rise: 19:06 | Tran: 3:53 | Set: 12:44

Alt: 25.75° Az: 323.85° Direction: North-West

ε Cephei is a variable and double hypergiant star of spectral class F0 in the constellation of Cepheus.

ε Cephei visual magnitude is 4.19. Because of its moderate brightness, ε Cephei is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of ε Cephei. The red arrow shows the motion of ε Cephei during the next 1000 years (7.45 arcmin in Right Ascension and 0.80 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 22h 15m 57s

Declination +57° 10’ 15”

Hour Angle 05h 14m 15s

Sidereal Time 03h 30m 13s

J2000

Right Ascension 22h 15m 02s

Declination +57° 02’ 36”

Galactic Coordinates

Galactic Longitude 102.86°

Galactic Latitude 0.4°

Finder Chart

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Finder chart for ε Cephei (epsilon Cephei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.19

Class Hypergiant

Absolute magnitude 2.14

Spectral Type F0IV

Color Index (B-V) 0.28

Temperature 7591K

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

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

Star System Properties

ε Cephei 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 Cephei double sysyem:

Main star magnitude 4.19

Secondary star magnitude 9.49

Magnitude difference 5.3

Separation 127.8 arcsec

Distance, Radial Speed, Proper Motion

ε Cephei is distant 83.89 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

Distance (parsec) 25.73

Distance (light year) 83.89

Radial Speed -1 km/s

Proper Motion RA 0.447 arcsec/y

Proper Motion Dec 0.048"/y

Alternative Designations

Bayer designation ε Cephei
(epsilon Cephei)

Flamsteed designation 23 Cephei

Henry Draper Catalogue HD211336

SAO Catalogue SAO34227

Hipparcos Catalogue HIP109857

Durchmusterung Catalogue BD+56 2741

Gliese Catalogue NN 4266

General Catalogue of Variable Stars Eps Cep

Visibility from Your Location

Today's ε Cephei (epsilon Cephei) rise, transit and set times from Chengjiao, China are the following (all times relative to the local timezone Asia/Shanghai):

Azimuth: 32.8° RISE 19:06

Max altitude: 56.4° TRANSIT 3:53

Azimuth: 327.2° SET 12:44

Name:	Chengjiao, China
Latitude:	23° 33' 55.4" N
Longitude:	113° 34' 26.4" E
Timezone:	Asia/Shanghai

Set Location

Other stars in Cepheus