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: 6:46  
clear_day Transit: 12:51  
SunsetSet: 18:55 south
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All Constellations » Cassiopeia » 


Altitude: 72.0°   Azimuth: 324.8°   Direction: North-West

HR668 is a main-sequence star in the constellation of Cassiopeia.

HR668 visual magnitude is 6.6. Because of its reltive faintness, HR668 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 HR668:


HR668 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 72.0°
Azimuth: 324.8°
Direction: North-West

Celestial coordinates and finder chart of HR668

HR668 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 HR668 are provided in the following table:

02h 20m 12s
+64° 20’ 13”

The simplified sky map below shows the position of HR668 in the sky:

Finder chart HR668 star
Simplified finder chart for HR668.

Visibility of HR668 from your location

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

HR668 is circumpolar and transits at 02:13 UTC (altitude: 77.1°)

Digitized Sky Survey image of HR668

The image below is a photograph of HR668 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 HR668 is -0.019 arcsec per year in Right Ascension and 0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR668 star
DSS2 image of HR668. The red arrow shows the motion of HR668 during the next 10000 years (-3.17 arcmin in Right Ascension and 3.00 arcmin in declination);

Distance of HR668 from the Sun and relative movement

HR668 is distant 470.42 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

144.30 pc
470.42 ly
-26 km/s
-0.019 arcsec/year
0.018 arcsec/year

Spectral properties of HR668

HR668 belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR668 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR668. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR668