HR7917

Above the horizon. Rise: 11:24 | Tran: 20:26 | Set: 5:31

Alt: 57.41° Az: 118.64° Direction: East-South-East

HR7917 is a double main-sequence star of spectral class A2 in the constellation of Cygnus.

HR7917 visual magnitude is 6.08. Because of its faintness, HR7917 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 HR7917. The red arrow shows the motion of HR7917 during the next 10000 years (1.33 arcmin in Right Ascension and 6.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 41m 37s

Declination +29° 53’ 39”

Hour Angle 21h 47m 49s

Sideral Time 18h 29m 26s

J2000

Right Ascension 20h 40m 36s

Declination +29° 48’ 19”

Galactic Coordinates

Galactic Longitude 71.9°

Galactic Latitude -7.32°

Finder Chart

Simplified finder chart for HR7917.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.08

Class Main-sequence

Absolute magnitude 1.51

Spectral Type A2V

Color Index (B-V) 0.14

Temperature 8658K

The red dot in the diagram below shows where HR7917 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7917. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7917 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR7917 double sysyem:

Main star magnitude 6.08

Secondary star magnitude 10.58

Magnitude difference 4.5

Separation 0.9 arcsec

Distance, Radial Speed, Proper Motion

HR7917 is distant 267.21 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

Distance (parsec) 81.97

Distance (light year) 267.21

Radial Speed -30 km/s

Proper Motion RA 0.008 arcsec/y

Proper Motion Dec 0.036"/y

Alternative Designations

Henry Draper Catalogue HD197120

SAO Catalogue SAO88997

Hipparcos Catalogue HIP102033

Durchmusterung Catalogue BD+29 4131

Aitken Double Star Catalogue ADS14149

Visibility from Your Location

Today's HR7917 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 60.1° RISE 11:24

Max altitude: 68.4° TRANSIT 20:26

Azimuth: 299.9° SET 5:31

Set Location

Other stars in Cygnus