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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: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cassiopeia » 


Altitude: 41.3°   Azimuth: 48.3°   Direction: North-East

HR9000 is a giant star in the constellation of Cassiopeia.

HR9000 visual magnitude is 6.51. Because of its reltive faintness, HR9000 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 HR9000:


HR9000 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 41.3°
Azimuth: 48.3°
Direction: North-East

Celestial coordinates and finder chart of HR9000

HR9000 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 HR9000 are provided in the following table:

23h 44m 48s
+55° 47’ 58”

The simplified sky map below shows the position of HR9000 in the sky:

Finder chart HR9000 star
Simplified finder chart for HR9000.

Visibility of HR9000 from your location

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

HR9000 is circumpolar and transits at 19:15 UTC (altitude: 85.7°)

Digitized Sky Survey image of HR9000

The image below is a photograph of HR9000 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 HR9000 is 0.02 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR9000 star
DSS2 image of HR9000. The red arrow shows the motion of HR9000 during the next 10000 years (3.33 arcmin in Right Ascension and -0.83 arcmin in declination);

Distance of HR9000 from the Sun and relative movement

HR9000 is distant 473.15 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

145.14 pc
473.15 ly
9 km/s
0.02 arcsec/year
-0.005 arcsec/year

Spectral properties of HR9000

HR9000 belongs to spectral class G4


The red dot in the diagram below shows where HR9000 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR9000. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR9000