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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
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Ursa Major » 


Altitude: 73.7°   Azimuth: 202.2°   Direction: South-South-West

HR4278 is a giant star in the constellation of Ursa Major.

HR4278 visual magnitude is 6. Because of its reltive faintness, HR4278 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 HR4278:


HR4278 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 73.7°
Azimuth: 202.2°
Direction: South-South-West

Celestial coordinates and finder chart of HR4278

HR4278 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 HR4278 are provided in the following table:

10h 59m 32s
+36° 05’ 35”
Ursa Major

The simplified sky map below shows the position of HR4278 in the sky:

Finder chart HR4278 star
Simplified finder chart for HR4278.

Visibility of HR4278 from your location

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

Today's HR4278 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 53.9°
Max altitude: 74.6°
Azimuth: 306.1°

Digitized Sky Survey image of HR4278

The image below is a photograph of HR4278 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 HR4278 is 0.071 arcsec per year in Right Ascension and -0.049 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4278 star
DSS2 image of HR4278. The red arrow shows the motion of HR4278 during the next 10000 years (11.83 arcmin in Right Ascension and -8.17 arcmin in declination);

Distance of HR4278 from the Sun and relative movement

HR4278 is distant 888.28 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

272.48 pc
888.28 ly
-26 km/s
0.071 arcsec/year
-0.049 arcsec/year

Spectral properties of HR4278

HR4278 belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR4278 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4278. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4278