HR3911

HR3911 is a double hypergiant star in the constellation of Ursa Major.

HR3911 visual magnitude is 6.27. Because of its reltive faintness, HR3911 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 HR3911:

Color of HR3911 ⬤

Magnitude of HR3911 6.27

Class Hypergiant

VISIBILITY RIGHT NOW HR3911 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 68°.

Celestial coordinates and finder chart of HR3911

HR3911 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 HR3911 are provided in the following table:

Right Ascension J2000 09h 55m 03s

Declination J2000 +61° 06’ 57”

Galactic Longitude 151.35°

Galactic Latitude 45.07°

Constellation Ursa Major

The simplified sky map below shows the position of HR3911 in the sky:

Simplified finder chart for HR3911.

Visibility of HR3911 from your location

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

HR3911 is circumpolar and transits at 21:46 UTC (altitude: 80.4°)

Digitized Sky Survey image of HR3911

The image below is a photograph of HR3911 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 HR3911 is 0.009 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR3911. The red arrow shows the motion of HR3911 during the next 100000 years (15.00 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR3911 from the Sun and relative movement

HR3911 is distant 388.56 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

Distance (parsec) 119.19 pc

Distance (light year) 388.56 ly

Heliocentric radial velocity -11 km/s

Proper Motion RA 0.009 arcsec/year

Proper Motion Dec -0.002 arcsec/year

Spectral properties of HR3911

HR3911 belongs to spectral class K0

Absolute magnitude 0.89

Spectral Type K0

Color Index (B-V) 1.05

Temperature of HR3911 4626K

The red dot in the diagram below shows where HR3911 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR3911. Attribution: Richard Powell / CC BY-SA

HR3911 star system properties

HR3911 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR3911 double sysyem:

Main star magnitude 6.27

Secondary star magnitude 13.07

Magnitude difference 6.8

Separation 12.2 arcsec

Alternative designations of HR3911

Henry Draper Catalogue HD85583

SAO Catalogue SAO15023

Hipparcos Catalogue HIP48638

Durchmusterung Catalogue BD+61 1151

FK5 Catalogue 2790

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In Evidence

Other stars in Ursa Major