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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
SunriseRise: 7:01  
clear_day Transit: 12:12  
SunsetSet: 17:24
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All Constellations » Cassiopeia » 


Altitude: 80.5°   Azimuth: 18.6°   Direction: North-North-East

HR266 is a multiple sub-giant star in the constellation of Cassiopeia.

HR266 visual magnitude is 5.55. Because of its reltive faintness, HR266 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR266 is 0.032 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR266 star
DSS2 image of HR266. The red arrow shows the motion of HR266 during the next 10000 years (5.33 arcmin in Right Ascension and -1.33 arcmin in declination);

Key facts about HR266


HR266 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 80.5°
Azimuth: 18.6°
Direction: North-North-East

Celestial coordinates and finder chart of HR266

HR266 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 HR266 are provided in the following table:

00h 56m 47s
+60° 21’ 46”

The simplified sky map below shows the position of HR266 in the sky:

Finder chart HR266 star
Simplified finder chart for HR266.

Visibility of HR266 from your location

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

HR266 is circumpolar and transits at 14:48 UTC (altitude: 81.1°)

Distance of HR266 from the Sun and relative movement

HR266 is distant 613.94 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.

188.32 pc
613.94 ly
-5 km/s
0.032 arcsec/year
-0.008 arcsec/year

Spectral properties of HR266

HR266 belongs to spectral class B9 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where HR266 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR266. Attribution: Richard Powell / CC BY-SA

HR266 star system properties

HR266 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 HR266 double sysyem:

0.2 arcsec

Alternative designations of HR266