Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Cassiopeia » 


Altitude: 56.2°   Azimuth: 56.2°   Direction: North-East

HR9010 is a bright giant star in the constellation of Cassiopeia.

HR9010 visual magnitude is 5.51. Because of its reltive faintness, HR9010 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 HR9010:

Bright giant

HR9010 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 56.2°
Azimuth: 56.2°
Direction: North-East

Celestial coordinates and finder chart of HR9010

HR9010 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 HR9010 are provided in the following table:

23h 47m 01s
+57° 27’ 05”

The simplified sky map below shows the position of HR9010 in the sky:

Finder chart HR9010 star
Simplified finder chart for HR9010.

Visibility of HR9010 from your location

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

HR9010 is circumpolar and transits at 23:28 UTC (altitude: 84.0°)

Digitized Sky Survey image of HR9010

The image below is a photograph of HR9010 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 HR9010 is 0.002 arcsec per year in Right Ascension and -0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR9010 star
DSS2 image of HR9010. The red arrow shows the motion of HR9010 during the next 100000 years (3.33 arcmin in Right Ascension and -5.00 arcmin in declination);

Distance of HR9010 from the Sun and relative movement

HR9010 is distant 1,671.79 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

512.82 pc
1,671.79 ly
-6 km/s
0.002 arcsec/year
-0.003 arcsec/year

Spectral properties of HR9010

HR9010 belongs to spectral class K3 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where HR9010 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR9010. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR9010