Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
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All Constellations » Cepheus » 

13 Cephei

Altitude: 81.5°   Azimuth: 48.4°   Direction: North-East

13 Cephei is a variable supergiant star in the constellation of Cepheus.

13 Cephei visual magnitude is 5.8. Because of its reltive faintness, 13 Cephei should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 13 Cephei:


13 Cephei is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 81.5°
Azimuth: 48.4°
Direction: North-East

Celestial coordinates and finder chart of 13 Cephei

13 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 13 Cephei are provided in the following table:

21h 54m 53s
+56° 36’ 41”

The simplified sky map below shows the position of 13 Cephei in the sky:

Finder chart 13 Cephei star
Simplified finder chart for 13 Cephei.

Visibility of 13 Cephei from your location

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

13 Cephei is circumpolar and transits at 21:41 UTC (altitude: 84.9°)

Digitized Sky Survey image of 13 Cephei

The image below is a photograph of 13 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 13 Cephei is -0.003 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 13 Cephei star
DSS2 image of 13 Cephei. The red arrow shows the motion of 13 Cephei during the next 100000 years (-5.00 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of 13 Cephei from the Sun and relative movement

13 Cephei is distant 2,527.13 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

775.19 pc
2,527.13 ly
-15 km/s
-0.003 arcsec/year
-0.001 arcsec/year

Spectral properties of 13 Cephei

13 Cephei belongs to spectral class B8 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where 13 Cephei is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of 13 Cephei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 13 Cephei