Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sunny DaytimeWhat's Visible Now
All Constellations » Ursa Major » 


Altitude: 65.3°   Azimuth: 340.2°   Direction: North-North-West

HR3918 is a giant star in the constellation of Ursa Major.

HR3918 visual magnitude is 5.83. Because of its reltive faintness, HR3918 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 HR3918:


HR3918 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 65.3°
Azimuth: 340.2°
Direction: North-North-West

Celestial coordinates and finder chart of HR3918

HR3918 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 HR3918 are provided in the following table:

09h 58m 22s
+72° 52’ 45”
Ursa Major

The simplified sky map below shows the position of HR3918 in the sky:

Finder chart HR3918 star
Simplified finder chart for HR3918.

Visibility of HR3918 from your location

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

HR3918 is circumpolar and transits at 09:46 UTC (altitude: 68.6°)

Digitized Sky Survey image of HR3918

The image below is a photograph of HR3918 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 HR3918 is -0.076 arcsec per year in Right Ascension and -0.035 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3918 star
DSS2 image of HR3918. The red arrow shows the motion of HR3918 during the next 10000 years (-12.67 arcmin in Right Ascension and -5.83 arcmin in declination);

Distance of HR3918 from the Sun and relative movement

HR3918 is distant 370.03 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

113.51 pc
370.03 ly
4 km/s
-0.076 arcsec/year
-0.035 arcsec/year

Spectral properties of HR3918

HR3918 belongs to spectral class K3


The red dot in the diagram below shows where HR3918 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3918. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3918