HR7786

HR7786 is a variable giant star in the constellation of Cygnus.

HR7786 visual magnitude is 6.5. Because of its reltive faintness, HR7786 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 HR7786:

Color of HR7786 ⬤

Magnitude of HR7786 6.5

Class Giant

VISIBILITY RIGHT NOW HR7786 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 40°.

Celestial coordinates and finder chart of HR7786

HR7786 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 HR7786 are provided in the following table:

Right Ascension J2000 20h 19m 56s

Declination J2000 +46° 50’ 14”

Galactic Longitude 83.35°

Galactic Latitude 5.93°

Constellation Cygnus

The simplified sky map below shows the position of HR7786 in the sky:

Simplified finder chart for HR7786.

Visibility of HR7786 from your location

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

HR7786 is circumpolar and transits at 08:01 UTC (altitude: 85.4°)

Digitized Sky Survey image of HR7786

The image below is a photograph of HR7786 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 HR7786 is 0.001 arcsec per year in Right Ascension and 0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR7786. The red arrow shows the motion of HR7786 during the next 10000 years (0.17 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of HR7786 from the Sun and relative movement

HR7786 is distant 1,220.97 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

Distance (parsec) 374.53 pc

Distance (light year) 1,220.97 ly

Heliocentric radial velocity -11 km/s

Proper Motion RA 0.001 arcsec/year

Proper Motion Dec 0.01 arcsec/year

Spectral properties of HR7786

HR7786 belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star. HR7786 is also a Si chemically peculiar star.

Absolute magnitude -1.37

Spectral Type B8III

Color Index (B-V) -0.06

Temperature of HR7786 10941K

The red dot in the diagram below shows where HR7786 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7786. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7786

Henry Draper Catalogue HD193722

SAO Catalogue SAO49482

Hipparcos Catalogue HIP100250

Durchmusterung Catalogue BD+46 2910

General Catalogue of Variable Stars V1584 Cyg

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Other stars in Cygnus