13 Cephei

13 Cephei is a variable supergiant star in the constellation of Cepheus.

13 Cephei visual magnitude is 5.8. Because of its reltive faintness, 13 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 13 Cephei:

Color of 13 Cephei ⬤

Magnitude of 13 Cephei 5.8

Class Supergiant

VISIBILITY RIGHT NOW 13 Cephei is above the horizon from Greenwich, United Kingdom [change]. Altitude: 29°.

Celestial coordinates and finder chart of 13 Cephei

13 Cephei is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 13 Cephei are provided in the following table:

Right Ascension J2000 21h 54m 53s

Declination J2000 +56° 36’ 41”

Galactic Longitude 100.39°

Galactic Latitude 1.68°

Constellation Cepheus

The simplified sky map below shows the position of 13 Cephei in the sky:

Simplified finder chart for 13 Cephei.

Visibility of 13 Cephei from your location

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

13 Cephei is circumpolar and transits at 10:00 UTC (altitude: 84.9°)

Digitized Sky Survey image of 13 Cephei

The image below is a photograph of 13 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 13 Cephei is -0.003 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 13 Cephei. The red arrow shows the motion of 13 Cephei during the next 100000 years (-5.00 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of 13 Cephei from the Sun and relative movement

13 Cephei is distant 2,527.13 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 775.19 pc

Distance (light year) 2,527.13 ly

Heliocentric radial velocity -15 km/s

Proper Motion RA -0.003 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of 13 Cephei

13 Cephei belongs to spectral class B8 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -3.65

Spectral Type B8I

Color Index (B-V) 0.73

Temperature of 13 Cephei 5501K

The red dot in the diagram below shows where 13 Cephei is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 13 Cephei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 13 Cephei

Flamsteed designation 13 Cephei

Henry Draper Catalogue HD208501

SAO Catalogue SAO33864

Hipparcos Catalogue HIP108165

Durchmusterung Catalogue BD+55 2644

FK5 Catalogue 3749

General Catalogue of Variable Stars 13963

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Other stars in Cepheus