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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
wb_twilight Civil TwilightWhat's Visible Now?
All Constellations » Cepheus » 

ι Cephei (iota Cephei)

Altitude: 29.6°   Azimuth: 12.6°   Direction: North-North-East

ι Cephei is a hypergiant star in the constellation of Cepheus.

ι Cephei visual magnitude is 3.52. Because of its moderate brightness, ι Cephei should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about ι Cephei:


ι Cephei (iota Cephei) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 29.6°
Azimuth: 12.6°
Direction: North-North-East

Celestial coordinates and finder chart of ι Cephei

ι Cephei is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ι Cephei are provided in the following table:

22h 49m 40s
+66° 12’ 02”

The simplified sky map below shows the position of ι Cephei in the sky:

Finder chart ι Cephei (iota Cephei) star
Simplified finder chart for ι Cephei (iota Cephei).

Visibility of ι Cephei from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

ι Cephei (iota Cephei) is circumpolar and transits at 17:44 UTC (altitude: 75.3°)

Digitized Sky Survey image of ι Cephei

The image below is a photograph of ι Cephei from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of ι Cephei is -0.065 arcsec per year in Right Ascension and -0.125 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of ι Cephei (iota Cephei) star
DSS2 image of ι Cephei. The red arrow shows the motion of ι Cephei during the next 1000 years (-1.08 arcmin in Right Ascension and -2.08 arcmin in declination);

Distance of ι Cephei from the Sun and relative movement

ι Cephei is distant 115.32 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

35.37 pc
115.32 ly
-12 km/s
-0.065 arcsec/year
-0.125 arcsec/year

Spectral properties of ι Cephei

ι Cephei belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

Alternative designations of ι Cephei

ι Cephei
(iota Cephei)