HR4917

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

HR4917 visual magnitude is 5.82. Because of its reltive faintness, HR4917 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 HR4917:

Color of HR4917 ⬤

Magnitude of HR4917 5.82

Class

VISIBILITY RIGHT NOW HR4917 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 65°.

Celestial coordinates and finder chart of HR4917

HR4917 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 HR4917 are provided in the following table:

Right Ascension J2000 12h 56m 17s

Declination J2000 +54° 05’ 57”

Galactic Longitude 121.36°

Galactic Latitude 63.01°

Constellation Ursa Major

The simplified sky map below shows the position of HR4917 in the sky:

Simplified finder chart for HR4917.

Visibility of HR4917 from your location

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

HR4917 is circumpolar and transits at 00:35 UTC (altitude: 87.4°)

Digitized Sky Survey image of HR4917

The image below is a photograph of HR4917 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 HR4917 is -0.077 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

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);

Distance of HR4917 from the Sun and relative movement

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 pc

Distance (light year) 255.89 ly

Heliocentric radial velocity -5 km/s

Proper Motion RA -0.077 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of HR4917

HR4917 belongs to spectral class A5

Absolute magnitude 1.35

Spectral Type A5

Color Index (B-V) 0.19

Temperature of HR4917 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

HR4917 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

Alternative designations of HR4917

Henry Draper Catalogue HD112486

SAO Catalogue SAO28572

Hipparcos Catalogue HIP63143

Durchmusterung Catalogue BD+54 1556

Aitken Double Star Catalogue ADS8710

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In Evidence

Other stars in Ursa Major