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All Constellations » Cepheus » 

η Cephei (eta Cephei)

Above the horizon.  Circumpolar today
Alt: 78.33°   Az: 22.77°   Direction: North-North-East

η Cephei is a double hypergiant star of spectral class K0 in the constellation of Cepheus.

η Cephei visual magnitude is 3.43. Because of its moderate brightness, η 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.

Image of η Cephei (eta Cephei) star
DSS2 image of η Cephei. The red arrow shows the motion of η Cephei during the next 1000 years (1.45 arcmin in Right Ascension and 13.63 arcmin in declination);

Celestial Coordinates

Apparent

20h 45m 47s
+61° 55’ 56”
23h 21m 40s
20h 07m 28s

J2000

20h 45m 17s
+61° 50’ 20”

Galactic Coordinates

97.86°
11.64°

Finder Chart

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Finder chart for η Cephei (eta Cephei).

Magnitude, Color, Spectral Class

3.43
Hypergiant

2.65
K0IV
4943K

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

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

Star System Properties

η Cephei 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 η Cephei double sysyem:

3.43
11.63
8.2
51.7 arcsec

Distance, Radial Speed, Proper Motion

η Cephei is distant 46.75 light years from the Sun and it is moving towards the Sun at the speed of 87 kilometers per second.

14.34
46.75
-87 km/s
0.087 arcsec/y
0.818"/y

Alternative Designations

η Cephei
(eta Cephei)
SAO19019
SAO19019

Visibility from Your Location

η Cephei (eta Cephei) is circumpolar and transits at 04:37 UTC (altitude: 79.5°)