HR4103

HR4103 is a hypergiant star in the constellation of Ursa Major.

HR4103 visual magnitude is 6.35. Because of its reltive faintness, HR4103 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 HR4103:

Color of HR4103 ⬤

Magnitude of HR4103 6.35

Class Hypergiant

VISIBILITY RIGHT NOW HR4103 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 59°.

Celestial coordinates and finder chart of HR4103

HR4103 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 HR4103 are provided in the following table:

Right Ascension J2000 10h 28m 36s

Declination J2000 +45° 12’ 43”

Galactic Longitude 170.89°

Galactic Latitude 56.38°

Constellation Ursa Major

The simplified sky map below shows the position of HR4103 in the sky:

Simplified finder chart for HR4103.

Visibility of HR4103 from your location

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

HR4103 is circumpolar and transits at 22:20 UTC (altitude: 83.7°)

Digitized Sky Survey image of HR4103

The image below is a photograph of HR4103 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 HR4103 is -0.021 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR4103. The red arrow shows the motion of HR4103 during the next 10000 years (-3.50 arcmin in Right Ascension and -3.17 arcmin in declination);

Distance of HR4103 from the Sun and relative movement

HR4103 is distant 763.47 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 234.19 pc

Distance (light year) 763.47 ly

Heliocentric radial velocity -4 km/s

Proper Motion RA -0.021 arcsec/year

Proper Motion Dec -0.019 arcsec/year

Spectral properties of HR4103

HR4103 belongs to spectral class K0

Absolute magnitude -0.50

Spectral Type K0

Color Index (B-V) 1.32

Temperature of HR4103 4086K

The red dot in the diagram below shows where HR4103 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR4103. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4103

Henry Draper Catalogue HD90602

SAO Catalogue SAO43356

Hipparcos Catalogue HIP51290

Durchmusterung Catalogue BD+45 1832

FK5 Catalogue 2838

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In Evidence

Other stars in Ursa Major