HR7759

Altitude: 74.1° Azimuth: 127.9° Direction: South-East

HR7759 is a variable and multiple bright giant star in the constellation of Cygnus.

HR7759 visual magnitude is 5.24. Because of its reltive faintness, HR7759 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 HR7759:

Color of HR7759 ⬤

Magnitude of HR7759 5.24

Class Bright giant

VISIBILITY RIGHT NOW

HR7759 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 74.1°
Azimuth: 127.9°
Direction: South-East

Celestial coordinates and finder chart of HR7759

HR7759 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 HR7759 are provided in the following table:

Right Ascension J2000 20h 16m 55s

Declination J2000 +40° 21’ 54”

Galactic Longitude 77.67°

Galactic Latitude 2.76°

Constellation Cygnus

The simplified sky map below shows the position of HR7759 in the sky:

Simplified finder chart for HR7759.

Visibility of HR7759 from your location

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

HR7759 is circumpolar and transits at 15:47 UTC (altitude: 78.9°)

Digitized Sky Survey image of HR7759

The image below is a photograph of HR7759 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 HR7759 is 0.004 arcsec per year in Right Ascension and -0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR7759. The red arrow shows the motion of HR7759 during the next 100000 years (6.67 arcmin in Right Ascension and -5.00 arcmin in declination);

Distance of HR7759 from the Sun and relative movement

HR7759 is distant 1,000.00 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

Distance (parsec) 306.75 pc

Distance (light year) 1,000.00 ly

Heliocentric radial velocity -20 km/s

Proper Motion RA 0.004 arcsec/year

Proper Motion Dec -0.003 arcsec/year

Spectral properties of HR7759

HR7759 belongs to spectral class K3 and has a luminosity class of II corresponding to a bright giant star.

Absolute magnitude -2.19

Spectral Type K3II

Color Index (B-V) 1.65

Temperature of HR7759 3581K

The red dot in the diagram below shows where HR7759 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7759. Attribution: Richard Powell / CC BY-SA

HR7759 star system properties

HR7759 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR7759 double sysyem:

Main star magnitude 5.24

Secondary star magnitude 10.74

Magnitude difference 5.5

Separation 12.8 arcsec

Alternative designations of HR7759

Henry Draper Catalogue HD193092

SAO Catalogue SAO49410

Hipparcos Catalogue HIP99968

Durchmusterung Catalogue BD+39 4114

General Catalogue of Variable Stars 12981

Aitken Double Star Catalogue ADS13640

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