HR4108

HR4108 is a giant star in the constellation of Ursa Major.

HR4108 visual magnitude is 6.12. Because of its reltive faintness, HR4108 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 HR4108:

Color of HR4108 ⬤

Magnitude of HR4108 6.12

Class Giant

VISIBILITY RIGHT NOW HR4108 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 40°.

Celestial coordinates and finder chart of HR4108

HR4108 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4108 are provided in the following table:

Right Ascension J2000 10h 30m 26s

Declination J2000 +64° 15’ 26”

Galactic Longitude 144.32°

Galactic Latitude 46.59°

Constellation Ursa Major

The simplified sky map below shows the position of HR4108 in the sky:

Simplified finder chart for HR4108.

Visibility of HR4108 from your location

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

HR4108 is circumpolar and transits at 22:06 UTC (altitude: 77.2°)

Digitized Sky Survey image of HR4108

The image below is a photograph of HR4108 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 HR4108 is -0.047 arcsec per year in Right Ascension and -0.059 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR4108. The red arrow shows the motion of HR4108 during the next 10000 years (-7.83 arcmin in Right Ascension and -9.83 arcmin in declination);

Distance of HR4108 from the Sun and relative movement

HR4108 is distant 289.26 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

Distance (parsec) 88.73 pc

Distance (light year) 289.26 ly

Heliocentric radial velocity -13 km/s

Proper Motion RA -0.047 arcsec/year

Proper Motion Dec -0.059 arcsec/year

Spectral properties of HR4108

HR4108 belongs to spectral class A7 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude 1.38

Spectral Type A7III

Color Index (B-V) 0.16

Temperature of HR4108 8486K

The red dot in the diagram below shows where HR4108 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4108. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4108

Henry Draper Catalogue HD90745

SAO Catalogue SAO15200

Hipparcos Catalogue HIP51448

Durchmusterung Catalogue BD+64 789

FK5 Catalogue 2839

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In Evidence

Other stars in Ursa Major