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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
wb_twilight   (Astronomical Twilight)   What's Visible Now?
All Constellations » Cepheus » 

δ Cephei (delta Cephei)

Above the horizon.  Circumpolar today
Altitude: 43.2°   Azimuth: 45.8°   Direction: North-East

δ Cephei is a variable and multiple supergiant star of spectral class F5 in the constellation of Cepheus.

δ Cephei visual magnitude is 3.75. Because of its moderate brightness, δ 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.

Celestial coordinates and finder chart of δ Cephei

Finder chart δ Cephei (delta Cephei) star
Simplified finder chart for δ Cephei (delta Cephei).

δ Cephei is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of δ Cephei are provided in the following table:

22h 29m 10s
+58° 24’ 55”
105.19°
0.53°
Cepheus
Image of δ Cephei (delta Cephei) star
DSS2 image of δ Cephei. The red arrow shows the motion of δ Cephei during the next 10000 years (2.50 arcmin in Right Ascension and 0.17 arcmin in declination);

Key facts about δ Cephei

3.75
Supergiant

and has a luminosity class of I corresponding to a supergiant star.

-3.64
F5I
5968K

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

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

δ Cephei star system properties

δ Cephei is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the δ Cephei double sysyem:

3.75
6.15
2.4
40.8 arcsec

Distance of δ Cephei from the Sun and relative movement

δ Cephei is distant 981.93 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

301.20 pc
981.93 ly
-15 km/s
0.015 arcsec/year
0.001 arcsec/year

Alternative designations of δ Cephei

δ Cephei
(delta Cephei)
SAO34508
SAO34508

Visibility of δ Cephei from your location

δ Cephei (delta Cephei) is circumpolar and transits at 04:17 UTC (altitude: 83.1°)