Errai - γ Cephei (gamma Cephei)

Above the horizon. Circumpolar today

Alt: 55.11° Az: 19.62° Direction: North-North-East

Errai, also designated as γ Cephei (gamma Cephei), is a variable giant star of spectral class K1 in the constellation of Cepheus.

Errai visual magnitude is 3.21. Because of its moderate brightness, Errai 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 Errai - γ Cephei (gamma Cephei) star

DSS2 image of Errai. The red arrow shows the motion of Errai during the next 1000 years (-1.12 arcmin in Right Ascension and 2.52 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 23h 40m 23s

Declination +77° 46’ 11”

Hour Angle 19h 39m 47s

Sidereal Time 19h 20m 10s

J2000

Right Ascension 23h 39m 20s

Declination +77° 37’ 56”

Galactic Coordinates

Galactic Longitude 118.99°

Galactic Latitude 15.31°

Finder Chart

Simplified finder chart for Errai - γ Cephei (gamma Cephei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.21

Class Giant

Absolute magnitude 2.51

Spectral Type K1III

Color Index (B-V) 1.03

Temperature 4672K

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

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

Distance, Radial Speed, Proper Motion

Errai is distant 44.97 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

Distance (parsec) 13.79

Distance (light year) 44.97

Radial Speed -42 km/s

Proper Motion RA -0.067 arcsec/y

Proper Motion Dec 0.151"/y

Alternative Designations

Proper Name Errai

Bayer designation γ Cephei
(gamma Cephei)

Flamsteed designation 35 Cephei

Henry Draper Catalogue HD222404

SAO Catalogue SAO10818

Hipparcos Catalogue HIP116727

Durchmusterung Catalogue BD+76 928

Gliese Catalogue Gl 903

FK5 Catalogue 893

General Catalogue of Variable Stars 14656

Visibility from Your Location

Errai - γ Cephei (gamma Cephei) is circumpolar and transits at 22:08 UTC (altitude: 63.7°)

Set Location

Other stars in Cepheus