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TimezoneEurope/London
Sunrise: 4:58 
Transit: 12:56 
Sunset: 20:55
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All Constellations » Cassiopeia » 

HR91

Above the horizon.  Circumpolar today
Alt: 13.85°   Az: 4.91°   Direction: North

HR91 is a variable and double sub-giant star of spectral class B5 in the constellation of Cassiopeia.

HR91 visual magnitude is 5.57. Because of its faintness, HR91 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of HR91 star
DSS2 image of HR91. The red arrow shows the motion of HR91 during the next 10000 years (2.17 arcmin in Right Ascension and -0.67 arcmin in declination);

Celestial Coordinates

Apparent

00h 25m 38s
+52° 09’ 37”
12h 31m 08s
12h 56m 47s

J2000

00h 24m 15s
+52° 01’ 12”

Galactic Coordinates

118.68°
-10.63°

Finder Chart

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Finder chart for HR91.

Magnitude, Color, Spectral Class

5.57
Sub-giant

-2.55
B5IV
11920K

The red dot in the diagram below shows where HR91 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR91. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR91 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR91 double sysyem:

5.57
8.07
2.5
0.2 arcsec

Distance, Radial Speed, Proper Motion

HR91 is distant 1,369.75 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

420.17
1,369.75
-7 km/s
0.013 arcsec/y
-0.004"/y

Alternative Designations

SAO21366
SAO21366

Visibility from Your Location

HR91 is circumpolar and transits at 08:20 UTC (altitude: 89.3°)