HR7743

Above the horizon. Rise: 19:22 | Tran: 5:12 | Set: 14:58

Alt: 55.24° Az: 104.07° Direction: East-South-East

HR7743 is a double hypergiant star of spectral class K0 in the constellation of Cygnus.

HR7743 visual magnitude is 5.66. Because of its faintness, HR7743 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR7743. The red arrow shows the motion of HR7743 during the next 1000 years (-0.67 arcmin in Right Ascension and -1.77 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 16m 22s

Declination +33° 48’ 30”

Hour Angle 21h 13m 03s

Sidereal Time 17h 29m 26s

J2000

Right Ascension 20h 15m 23s

Declination +33° 43’ 45”

Galactic Coordinates

Galactic Longitude 71.99°

Galactic Latitude -0.68°

Finder Chart

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Finder chart for HR7743.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.66

Class Hypergiant

Absolute magnitude 0.84

Spectral Type K0III

Color Index (B-V) 0.91

Temperature 4970K

The red dot in the diagram below shows where HR7743 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7743. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7743 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 HR7743 double sysyem:

Main star magnitude 5.66

Secondary star magnitude 11.96

Magnitude difference 6.3

Separation 3 arcsec

Distance, Radial Speed, Proper Motion

HR7743 is distant 300.18 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 92.08

Distance (light year) 300.18

Radial Speed -10 km/s

Proper Motion RA -0.04 arcsec/y

Proper Motion Dec -0.106"/y

Alternative Designations

Henry Draper Catalogue HD192787

SAO Catalogue SAO69701

Hipparcos Catalogue HIP99841

Durchmusterung Catalogue BD+33 3827

Aitken Double Star Catalogue ADS13596

Visibility from Your Location

Today's HR7743 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.2° RISE 19:22

Max altitude: 72.3° TRANSIT 5:12

Azimuth: 303.8° SET 14:58

Set Location

Other stars in Cygnus