HR7940

HR7940 is a giant star in the constellation of Cepheus.

HR7940 visual magnitude is 6.32. Because of its reltive faintness, HR7940 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 HR7940:

Color of HR7940 ⬤

Magnitude of HR7940 6.32

Class Giant

VISIBILITY RIGHT NOW HR7940 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 49°.

Celestial coordinates and finder chart of HR7940

HR7940 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 HR7940 are provided in the following table:

Right Ascension J2000 20h 43m 13s

Declination J2000 +57° 06’ 51”

Galactic Longitude 93.88°

Galactic Latitude 9°

Constellation Cepheus

The simplified sky map below shows the position of HR7940 in the sky:

Simplified finder chart for HR7940.

Visibility of HR7940 from your location

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

HR7940 is circumpolar and transits at 08:29 UTC (altitude: 84.4°)

Digitized Sky Survey image of HR7940

The image below is a photograph of HR7940 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 HR7940 is -0.013 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7940. The red arrow shows the motion of HR7940 during the next 10000 years (-2.17 arcmin in Right Ascension and 0.50 arcmin in declination);

Distance of HR7940 from the Sun and relative movement

HR7940 is distant 6,269.23 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 1,923.08 pc

Distance (light year) 6,269.23 ly

Heliocentric radial velocity -15 km/s

Proper Motion RA -0.013 arcsec/year

Proper Motion Dec 0.003 arcsec/year

Spectral properties of HR7940

HR7940 belongs to spectral class B2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -5.10

Spectral Type B2III

Color Index (B-V) 0.33

Temperature of HR7940 7276K

The red dot in the diagram below shows where HR7940 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7940. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7940

Henry Draper Catalogue HD197770

SAO Catalogue SAO32832

Hipparcos Catalogue HIP102258

Durchmusterung Catalogue BD+56 2477

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In Evidence

Other stars in Cepheus