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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: 6:38  
clear_day Transit: 12:10  
SunsetSet: 17:43
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All Constellations » Cepheus » 

30 Cephei

Altitude: 34.7°   Azimuth: 331.5°   Direction: North-North-West

30 Cephei is a sub-giant star in the constellation of Cepheus.

30 Cephei visual magnitude is 5.19. Because of its reltive faintness, 30 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 30 Cephei is -0.003 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 30 Cephei star
DSS2 image of 30 Cephei. The red arrow shows the motion of 30 Cephei during the next 10000 years (-0.50 arcmin in Right Ascension and -4.17 arcmin in declination);

Key facts about 30 Cephei


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

Altitude: 34.7°
Azimuth: 331.5°
Direction: North-North-West

Celestial coordinates and finder chart of 30 Cephei

30 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 30 Cephei are provided in the following table:

22h 38m 39s
+63° 35’ 03”

The simplified sky map below shows the position of 30 Cephei in the sky:

Finder chart 30 Cephei star
Simplified finder chart for 30 Cephei.

Visibility of 30 Cephei from your location

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

30 Cephei is circumpolar and transits at 11:47 UTC (altitude: 77.9°)

Distance of 30 Cephei from the Sun and relative movement

30 Cephei is distant 319.61 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

98.04 pc
319.61 ly
11 km/s
-0.003 arcsec/year
-0.025 arcsec/year

Spectral properties of 30 Cephei

30 Cephei belongs to spectral class A3 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 30 Cephei is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of 30 Cephei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 30 Cephei