30 Cephei

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 skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 30 Cephei:

Color of 30 Cephei ⬤

Magnitude of 30 Cephei 5.19

Class Sub-giant

VISIBILITY RIGHT NOW 30 Cephei is above the horizon from Greenwich, United Kingdom [change]. Altitude: 45°.

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:

Right Ascension J2000 22h 38m 39s

Declination J2000 +63° 35’ 03”

Galactic Longitude 108.79°

Galactic Latitude 4.42°

Constellation Cepheus

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

Simplified finder chart for 30 Cephei.

Visibility of 30 Cephei from your location

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

30 Cephei is circumpolar and transits at 10:47 UTC (altitude: 77.9°)

Digitized Sky Survey image of 30 Cephei

The image below is a photograph of 30 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 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.

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);

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.

Distance (parsec) 98.04 pc

Distance (light year) 319.61 ly

Heliocentric radial velocity 11 km/s

Proper Motion RA -0.003 arcsec/year

Proper Motion Dec -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.

Absolute magnitude 0.23

Spectral Type A3IV

Color Index (B-V) 0.06

Temperature of 30 Cephei 9434K

The red dot in the diagram below shows where 30 Cephei is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of 30 Cephei

Flamsteed designation 30 Cephei

Henry Draper Catalogue HD214734

SAO Catalogue SAO20190

Hipparcos Catalogue HIP111797

Durchmusterung Catalogue BD+62 2102

FK5 Catalogue 853

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Other stars in Cepheus