We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cancer » 

66 Cancri

Altitude: 67.8°   Azimuth: 215.7°   Direction: South-West

66 Cancri is a multiple main-sequence star in the constellation of Cancer.

66 Cancri visual magnitude is 5.82. Because of its reltive faintness, 66 Cancri 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 66 Cancri:


66 Cancri is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 67.8°
Azimuth: 215.7°
Direction: South-West

Celestial coordinates and finder chart of 66 Cancri

66 Cancri 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 66 Cancri are provided in the following table:

09h 01m 24s
+32° 15’ 08”

The simplified sky map below shows the position of 66 Cancri in the sky:

Finder chart 66 Cancri star
Simplified finder chart for 66 Cancri.

Visibility of 66 Cancri from your location

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

Today's 66 Cancri rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 57.7°
Max altitude: 70.8°
Azimuth: 302.3°

Digitized Sky Survey image of 66 Cancri

The image below is a photograph of 66 Cancri 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 66 Cancri is -0.004 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 66 Cancri star
DSS2 image of 66 Cancri. The red arrow shows the motion of 66 Cancri during the next 100000 years (-6.67 arcmin in Right Ascension and 5.00 arcmin in declination);

Distance of 66 Cancri from the Sun and relative movement

66 Cancri is distant 509.38 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

156.25 pc
509.38 ly
-13 km/s
-0.004 arcsec/year
0.003 arcsec/year

Spectral properties of 66 Cancri

66 Cancri belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 66 Cancri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 66 Cancri. Attribution: Richard Powell / CC BY-SA

66 Cancri star system properties

66 Cancri is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 66 Cancri double sysyem:

4.6 arcsec

Alternative designations of 66 Cancri