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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 Nautical TwilightWhat's Visible Now?
All Constellations » Cepheus » 

18 Cephei

Altitude: 78.2°   Azimuth: 353.2°   Direction: North

18 Cephei is a variable giant star in the constellation of Cepheus.

18 Cephei visual magnitude is 5.29. Because of its reltive faintness, 18 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 18 Cephei:


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

Altitude: 78.2°
Azimuth: 353.2°
Direction: North

Celestial coordinates and finder chart of 18 Cephei

18 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 18 Cephei are provided in the following table:

22h 03m 52s
+63° 07’ 10”

The simplified sky map below shows the position of 18 Cephei in the sky:

Finder chart 18 Cephei star
Simplified finder chart for 18 Cephei.

Visibility of 18 Cephei from your location

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

18 Cephei is circumpolar and transits at 16:59 UTC (altitude: 78.4°)

Digitized Sky Survey image of 18 Cephei

The image below is a photograph of 18 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 18 Cephei is 0.031 arcsec per year in Right Ascension and 0.055 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 18 Cephei star
DSS2 image of 18 Cephei. The red arrow shows the motion of 18 Cephei during the next 10000 years (5.17 arcmin in Right Ascension and 9.17 arcmin in declination);

Distance of 18 Cephei from the Sun and relative movement

18 Cephei is distant 448.42 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

137.55 pc
448.42 ly
-4 km/s
0.031 arcsec/year
0.055 arcsec/year

Spectral properties of 18 Cephei

18 Cephei belongs to spectral class M5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 18 Cephei is situated in the HertzsprungÔÇôRussell diagram.

HR Diagram
H-R diagram showing the position of 18 Cephei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 18 Cephei