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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
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All Constellations » Cepheus » 

16 Cephei

Altitude: 36.8°   Azimuth: 11.6°   Direction: North-North-East

16 Cephei is a double main-sequence star in the constellation of Cepheus.

16 Cephei visual magnitude is 5.03. Because of its reltive faintness, 16 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 16 Cephei:


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

Altitude: 36.8°
Azimuth: 11.6°
Direction: North-North-East

Celestial coordinates and finder chart of 16 Cephei

16 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 16 Cephei are provided in the following table:

21h 59m 15s
+73° 10’ 48”

The simplified sky map below shows the position of 16 Cephei in the sky:

Finder chart 16 Cephei star
Simplified finder chart for 16 Cephei.

Visibility of 16 Cephei from your location

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

16 Cephei is circumpolar and transits at 16:38 UTC (altitude: 68.3°)

Digitized Sky Survey image of 16 Cephei

The image below is a photograph of 16 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 16 Cephei is -0.068 arcsec per year in Right Ascension and -0.161 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 16 Cephei star
DSS2 image of 16 Cephei. The red arrow shows the motion of 16 Cephei during the next 1000 years (-1.13 arcmin in Right Ascension and -2.68 arcmin in declination);

Distance of 16 Cephei from the Sun and relative movement

16 Cephei is distant 122.23 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

37.50 pc
122.23 ly
-21 km/s
-0.068 arcsec/year
-0.161 arcsec/year

Spectral properties of 16 Cephei

16 Cephei belongs to spectral class F5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 16 Cephei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 16 Cephei. Attribution: Richard Powell / CC BY-SA

16 Cephei star system properties

16 Cephei is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 16 Cephei double sysyem:

131.4 arcsec

Alternative designations of 16 Cephei