HR7938

HR7938 is a sub-giant star in the constellation of Cepheus.

HR7938 visual magnitude is 6.15. Because of its reltive faintness, HR7938 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 HR7938:

Color of HR7938 ⬤

Magnitude of HR7938 6.15

Class Sub-giant

VISIBILITY RIGHT NOW HR7938 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 42°.

Celestial coordinates and finder chart of HR7938

HR7938 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 HR7938 are provided in the following table:

Right Ascension J2000 20h 42m 39s

Declination J2000 +60° 36’ 05”

Galactic Longitude 96.66°

Galactic Latitude 11.16°

Constellation Cepheus

The simplified sky map below shows the position of HR7938 in the sky:

Simplified finder chart for HR7938.

Visibility of HR7938 from your location

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

HR7938 is circumpolar and transits at 08:24 UTC (altitude: 80.9°)

Digitized Sky Survey image of HR7938

The image below is a photograph of HR7938 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 HR7938 is -0.003 arcsec per year in Right Ascension and -0.014 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7938. The red arrow shows the motion of HR7938 during the next 10000 years (-0.50 arcmin in Right Ascension and -2.33 arcmin in declination);

Distance of HR7938 from the Sun and relative movement

HR7938 is distant 724.44 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

Distance (parsec) 222.22 pc

Distance (light year) 724.44 ly

Heliocentric radial velocity -7 km/s

Proper Motion RA -0.003 arcsec/year

Proper Motion Dec -0.014 arcsec/year

Spectral properties of HR7938

HR7938 belongs to spectral class A2 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -0.58

Spectral Type A2IV

Color Index (B-V) 0.01

Temperature of HR7938 10002K

The red dot in the diagram below shows where HR7938 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7938. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7938

Henry Draper Catalogue HD197734

SAO Catalogue SAO18998

Hipparcos Catalogue HIP102216

Durchmusterung Catalogue BD+60 2154

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In Evidence

Other stars in Cepheus