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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
SunriseRise: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
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All Constellations » Cepheus » 

12 Cephei

Altitude: 23.0°   Azimuth: 351.3°   Direction: North

12 Cephei is a giant star in the constellation of Cepheus.

12 Cephei visual magnitude is 5.52. Because of its reltive faintness, 12 Cephei should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of 12 Cephei is -0.008 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 12 Cephei star
DSS2 image of 12 Cephei. The red arrow shows the motion of 12 Cephei during the next 100000 years (-13.33 arcmin in Right Ascension and 0.00 arcmin in declination);

Key facts about 12 Cephei


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

Altitude: 23.0°
Azimuth: 351.3°
Direction: North

Celestial coordinates and finder chart of 12 Cephei

12 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 12 Cephei are provided in the following table:

21h 47m 25s
+60° 41’ 34”

The simplified sky map below shows the position of 12 Cephei in the sky:

Finder chart 12 Cephei star
Simplified finder chart for 12 Cephei.

Visibility of 12 Cephei from your location

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

12 Cephei is circumpolar and transits at 11:16 UTC (altitude: 80.8°)

Distance of 12 Cephei from the Sun and relative movement

12 Cephei is distant 467.05 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

143.27 pc
467.05 ly
-20 km/s
-0.008 arcsec/year

Spectral properties of 12 Cephei

12 Cephei belongs to spectral class M1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 12 Cephei is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of 12 Cephei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 12 Cephei