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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Ursa Major » 


Altitude: 9.2°   Azimuth: 341.5°   Direction: North-North-West

HR4486 is a multiple hypergiant star in the constellation of Ursa Major.

HR4486 visual magnitude is 6.44. Because of its reltive faintness, HR4486 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR4486 is -0.594 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR4486 star
DSS2 image of HR4486. The red arrow shows the motion of HR4486 during the next 1000 years (-9.90 arcmin in Right Ascension and 0.43 arcmin in declination);

Key facts about HR4486


HR4486 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.2°
Azimuth: 341.5°
Direction: North-North-West

Celestial coordinates and finder chart of HR4486

HR4486 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 HR4486 are provided in the following table:

11h 38m 44s
+45° 06’ 30”
Ursa Major

The simplified sky map below shows the position of HR4486 in the sky:

Finder chart HR4486 star
Simplified finder chart for HR4486.

Visibility of HR4486 from your location

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

HR4486 is circumpolar and transits at 01:28 UTC (altitude: 83.6°)

Distance of HR4486 from the Sun and relative movement

HR4486 is distant 75.92 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.

23.29 pc
75.92 ly
-18 km/s
-0.594 arcsec/year
0.026 arcsec/year

Spectral properties of HR4486

HR4486 belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4486 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4486. Attribution: Richard Powell / CC BY-SA

HR4486 star system properties

HR4486 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 HR4486 double sysyem:

9.4 arcsec

Alternative designations of HR4486

Gl 433.2A