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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Ursa Major » 


Altitude: 61.8°   Azimuth: 295.6°   Direction: West-North-West

HR4457 is a hypergiant star in the constellation of Ursa Major.

HR4457 visual magnitude is 5.63. Because of its reltive faintness, HR4457 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 HR4457:


HR4457 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 61.8°
Azimuth: 295.6°
Direction: West-North-West

Celestial coordinates and finder chart of HR4457

HR4457 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 HR4457 are provided in the following table:

11h 35m 04s
+54° 47’ 07”
Ursa Major

The simplified sky map below shows the position of HR4457 in the sky:

Finder chart HR4457 star
Simplified finder chart for HR4457.

Visibility of HR4457 from your location

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

HR4457 is circumpolar and transits at 06:39 UTC (altitude: 86.7°)

Digitized Sky Survey image of HR4457

The image below is a photograph of HR4457 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 HR4457 is 0.008 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR4457 star
DSS2 image of HR4457. The red arrow shows the motion of HR4457 during the next 100000 years (13.33 arcmin in Right Ascension and 13.33 arcmin in declination);

Distance of HR4457 from the Sun and relative movement

HR4457 is distant 410.58 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

125.94 pc
410.58 ly
18 km/s
0.008 arcsec/year
0.008 arcsec/year

Spectral properties of HR4457

HR4457 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR4457 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4457. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4457