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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: 6:38  
clear_day Transit: 12:10  
SunsetSet: 17:43
sleep NighttimeWhat's Visible Now?
All Constellations » Ursa Major » 


Altitude: 57.7°   Azimuth: 81.0°   Direction: East

HR4280 is a giant star in the constellation of Ursa Major.

HR4280 visual magnitude is 5.47. Because of its reltive faintness, HR4280 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR4280 is 0.011 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4280 star
DSS2 image of HR4280. The red arrow shows the motion of HR4280 during the next 10000 years (1.83 arcmin in Right Ascension and 0.50 arcmin in declination);

Key facts about HR4280


HR4280 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 57.7°
Azimuth: 81.0°
Direction: East

Celestial coordinates and finder chart of HR4280

HR4280 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 HR4280 are provided in the following table:

11h 00m 14s
+45° 31’ 33”
Ursa Major

The simplified sky map below shows the position of HR4280 in the sky:

Finder chart HR4280 star
Simplified finder chart for HR4280.

Visibility of HR4280 from your location

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

HR4280 is circumpolar and transits at 00:11 UTC (altitude: 84.0°)

Distance of HR4280 from the Sun and relative movement

HR4280 is distant 881.08 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

270.27 pc
881.08 ly
9 km/s
0.011 arcsec/year
0.003 arcsec/year

Spectral properties of HR4280

HR4280 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4280 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4280. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4280