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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:14 
Transit: 12:14 
Sunset: 17:14
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All Constellations » Ursa Major » 

HR4021

Above the horizon.  Circumpolar today
Alt: 36.60°   Az: 16.80°   Direction: North-North-East

HR4021 is a variable and multiple star of spectral class A7 in the constellation of Ursa Major.

HR4021 visual magnitude is 6.66. Because of its faintness, HR4021 is not visible to the naked eye.

Image of HR4021 star
DSS2 image of HR4021. The red arrow shows the motion of HR4021 during the next 10000 years (-5.17 arcmin in Right Ascension and -8.00 arcmin in declination);

Celestial Coordinates

Apparent

10h 19m 49s
+70° 56’ 02”
15h 01m 03s
01h 20m 52s

J2000

10h 17m 50s
+71° 03’ 38”

Galactic Coordinates

138.45°
41.12°

Finder Chart

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Finder chart for HR4021.

Magnitude, Color, Spectral Class

6.66

1.81
A7
7337K

The red dot in the diagram below shows where HR4021 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR4021. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR4021 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 HR4021 double sysyem:

6.66
7.36
0.7
16.6 arcsec

Distance, Radial Speed, Proper Motion

HR4021 is distant 304.67 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

93.46
304.67
11 km/s
-0.031 arcsec/y
-0.048"/y

Alternative Designations

SAO7099
SAO7099

Visibility from Your Location

HR4021 is circumpolar and transits at 00:38 UTC (altitude: 70.5°)