HR7966

Altitude: 55.2° Azimuth: 281.6° Direction: West-North-West

HR7966 is a double giant star in the constellation of Cygnus.

HR7966 visual magnitude is 6.4. Because of its reltive faintness, HR7966 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 HR7966:

Color of HR7966 ⬤

Magnitude of HR7966 6.4

Class Giant

VISIBILITY RIGHT NOW

HR7966 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 55.2°
Azimuth: 281.6°
Direction: West-North-West

Celestial coordinates and finder chart of HR7966

HR7966 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 HR7966 are provided in the following table:

Right Ascension J2000 20h 47m 20s

Declination J2000 +45° 34’ 46”

Galactic Longitude 85.16°

Galactic Latitude 1.37°

Constellation Cygnus

The simplified sky map below shows the position of HR7966 in the sky:

Simplified finder chart for HR7966.

Visibility of HR7966 from your location

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

HR7966 is circumpolar and transits at 03:57 UTC (altitude: 84.1°)

Digitized Sky Survey image of HR7966

The image below is a photograph of HR7966 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 HR7966 is 0.005 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 HR7966. The red arrow shows the motion of HR7966 during the next 10000 years (0.83 arcmin in Right Ascension and -4.17 arcmin in declination);

Distance of HR7966 from the Sun and relative movement

HR7966 is distant 1,309.24 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

Distance (parsec) 401.61 pc

Distance (light year) 1,309.24 ly

Heliocentric radial velocity -6 km/s

Proper Motion RA 0.005 arcsec/year

Proper Motion Dec -0.025 arcsec/year

Spectral properties of HR7966

HR7966 belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.62

Spectral Type K3III

Color Index (B-V) 1.61

Temperature of HR7966 3635K

The red dot in the diagram below shows where HR7966 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7966. Attribution: Richard Powell / CC BY-SA

HR7966 star system properties

HR7966 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR7966 double sysyem:

Main star magnitude 6.4

Secondary star magnitude 12.7

Magnitude difference 6.3

Separation 12.9 arcsec

Alternative designations of HR7966

Henry Draper Catalogue HD198237

SAO Catalogue SAO50060

Hipparcos Catalogue HIP102585

Durchmusterung Catalogue BD+45 3275

Aitken Double Star Catalogue ADS14298

In Evidence

Other stars in Cygnus