HR4917

Above the horizon. Circumpolar today

Alt: 45.95° Az: 55.33° Direction: South-South-West

HR4917 is a multiple star of spectral class A5 in the constellation of Ursa Major.

HR4917 visual magnitude is 5.82. Because of its faintness, HR4917 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 HR4917. The red arrow shows the motion of HR4917 during the next 10000 years (-12.83 arcmin in Right Ascension and 0.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 12h 57m 24s

Declination +53° 57’ 43”

Hour Angle 18h 54m 19s

Sidereal Time 07h 51m 43s

J2000

Right Ascension 12h 56m 17s

Declination +54° 05’ 57”

Galactic Coordinates

Galactic Longitude 121.36°

Galactic Latitude 63.01°

Finder Chart

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Finder chart for HR4917.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.82

Class

Absolute magnitude 1.35

Spectral Type A5

Color Index (B-V) 0.19

Temperature 8241K

The red dot in the diagram below shows where HR4917 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4917. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4917 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 HR4917 double sysyem:

Main star magnitude 5.82

Secondary star magnitude 7.62

Magnitude difference 1.8

Separation 3.5 arcsec

Distance, Radial Speed, Proper Motion

HR4917 is distant 255.89 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

Distance (parsec) 78.49

Distance (light year) 255.89

Radial Speed -5 km/s

Proper Motion RA -0.077 arcsec/y

Proper Motion Dec 0.001"/y

Alternative Designations

Henry Draper Catalogue HD112486

SAO Catalogue SAO28572

Hipparcos Catalogue HIP63143

Durchmusterung Catalogue BD+54 1556

Aitken Double Star Catalogue ADS8710

Visibility from Your Location

HR4917 is circumpolar and transits at 18:48 UTC (altitude: 87.5°)

Set Location

Other stars in Ursa Major