Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

25 Cephei

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

25 Cephei visual magnitude is 5.75. Because of its reltive faintness, 25 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 25 Cephei:

5.75
Giant
25 Cephei is above the horizon from Greenwich, United Kingdom [change]. Altitude: 75°.

Celestial coordinates and finder chart of 25 Cephei

25 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 25 Cephei are provided in the following table:

22h 18m 12s
+62° 48’ 15”
106.41°
4.96°
Cepheus

The simplified sky map below shows the position of 25 Cephei in the sky:

Finder chart 25 Cephei star
Simplified finder chart for 25 Cephei.

Visibility of 25 Cephei from your location

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

25 Cephei is circumpolar and transits at 17:34 UTC (altitude: 78.7°)

Digitized Sky Survey image of 25 Cephei

The image below is a photograph of 25 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 25 Cephei is 0.046 arcsec per year in Right Ascension and 0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 25 Cephei star
DSS2 image of 25 Cephei. The red arrow shows the motion of 25 Cephei during the next 10000 years (7.67 arcmin in Right Ascension and 2.50 arcmin in declination);

Distance of 25 Cephei from the Sun and relative movement

25 Cephei is distant 689.22 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

211.42 pc
689.22 ly
-2 km/s
0.046 arcsec/year
0.015 arcsec/year

Spectral properties of 25 Cephei

25 Cephei belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.

-0.88
K3III
4194K

The red dot in the diagram below shows where 25 Cephei is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 25 Cephei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 25 Cephei

SAO19991
SAO19991