HR7717

Below the horizon. Rise: 4:48 | Tran: 10:50 | Set: 16:53

Alt: -17.96° Az: 64.21° Direction: East-North-East

HR7717 is a double star of spectral class B9 in the constellation of Aquila.

HR7717 visual magnitude is 6.27. Because of its faintness, HR7717 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 HR7717. The red arrow shows the motion of HR7717 during the next 10000 years (1.67 arcmin in Right Ascension and -2.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 13m 51s

Declination +00° 56’ 39”

Hour Angle 15h 55m 44s

Sidereal Time 12h 09m 36s

J2000

Right Ascension 20h 12m 35s

Declination +00° 52’ 03”

Galactic Coordinates

Galactic Longitude 43.3°

Galactic Latitude -17.56°

Finder Chart

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Finder chart for HR7717.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.27

Class

HR7717 is also a CrEuSr chemically peculiar star.

Absolute magnitude -0.06

Spectral Type B9

Color Index (B-V) 0.02

Temperature 9882K

The red dot in the diagram below shows where HR7717 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7717. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR7717 is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the HR7717 double sysyem:

Main star magnitude 6.27

Secondary star magnitude 6.47

Magnitude difference 0.2

Separation 2.8 arcsec

Distance, Radial Speed, Proper Motion

HR7717 is distant 602.59 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

Distance (parsec) 184.84

Distance (light year) 602.59

Radial Speed -19 km/s

Proper Motion RA 0.01 arcsec/y

Proper Motion Dec -0.014"/y

Alternative Designations

Henry Draper Catalogue HD191984

SAO Catalogue SAO125567

Hipparcos Catalogue HIP99585

Durchmusterung Catalogue BD+00 4444

Aitken Double Star Catalogue ADS13506

Visibility from Your Location

Today's HR7717 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.1° RISE 4:48

Max altitude: 39.5° TRANSIT 10:50

Azimuth: 270.9° SET 16:53

Set Location

Other stars in Aquila