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: 6:47  
clear_day Transit: 12:50  
SunsetSet: 18:52 south
sunny DaytimeWhat's Visible Now
All Constellations » Cassiopeia » 


Altitude: 26.6°   Azimuth: 355.6°   Direction: North

HR9017 is a variable and multiple hypergiant star in the constellation of Cassiopeia.

HR9017 visual magnitude is 6.41. Because of its reltive faintness, HR9017 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 HR9017:


HR9017 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 26.6°
Azimuth: 355.6°
Direction: North

Celestial coordinates and finder chart of HR9017

HR9017 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR9017 are provided in the following table:

23h 48m 38s
+64° 52’ 35”

The simplified sky map below shows the position of HR9017 in the sky:

Finder chart HR9017 star
Simplified finder chart for HR9017.

Visibility of HR9017 from your location

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

HR9017 is circumpolar and transits at 23:34 UTC (altitude: 76.6°)

Digitized Sky Survey image of HR9017

The image below is a photograph of HR9017 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 HR9017 is 0.013 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR9017 star
DSS2 image of HR9017. The red arrow shows the motion of HR9017 during the next 10000 years (2.17 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR9017 from the Sun and relative movement

HR9017 is distant 718.06 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

220.26 pc
718.06 ly
-3 km/s
0.013 arcsec/year
-0.02 arcsec/year

Spectral properties of HR9017

HR9017 belongs to spectral class A0 HR9017 is also a SrSiCr chemically peculiar star.


The red dot in the diagram below shows where HR9017 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR9017. Attribution: Richard Powell / CC BY-SA

HR9017 star system properties

HR9017 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR9017 double sysyem:

0.7 arcsec

Alternative designations of HR9017