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: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:09 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Perseus » 


Altitude: 17.5°   Azimuth: 8.6°   Direction: North

HR690 is a variable and double supergiant star in the constellation of Perseus.

HR690 visual magnitude is 6.28. Because of its reltive faintness, HR690 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 HR690:


HR690 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 17.5°
Azimuth: 8.6°
Direction: North

Celestial coordinates and finder chart of HR690

HR690 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 HR690 are provided in the following table:

02h 23m 51s
+55° 21’ 51”

The simplified sky map below shows the position of HR690 in the sky:

Finder chart HR690 star
Simplified finder chart for HR690.

Visibility of HR690 from your location

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

HR690 is circumpolar and transits at 09:25 UTC (altitude: 86.1°)

Digitized Sky Survey image of HR690

The image below is a photograph of HR690 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 HR690 is 0.006 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR690 star
DSS2 image of HR690. The red arrow shows the motion of HR690 during the next 10000 years (1.00 arcmin in Right Ascension and -4.00 arcmin in declination);

Distance of HR690 from the Sun and relative movement

HR690 is distant 2,012.35 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

617.28 pc
2,012.35 ly
-26 km/s
0.006 arcsec/year
-0.024 arcsec/year

Spectral properties of HR690

HR690 belongs to spectral class F7 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR690 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR690. Attribution: Richard Powell / CC BY-SA

HR690 star system properties

HR690 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 HR690 double sysyem:

10 arcsec

Alternative designations of HR690