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: 4:47  
clear_day Transit: 12:56  
SunsetSet: 21:06 south
sunny DaytimeWhat's Visible Now
All Constellations » Cancer » 

39 Cancri

39 Cancri is a variable and multiple giant star in the constellation of Cancer.

39 Cancri visual magnitude is 6.39. Because of its reltive faintness, 39 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 39 Cancri:

39 Cancri is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 7°.

Celestial coordinates and finder chart of 39 Cancri

39 Cancri is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 39 Cancri are provided in the following table:

08h 40m 06s
+20° 00’ 28”

The simplified sky map below shows the position of 39 Cancri in the sky:

Finder chart 39 Cancri star
Simplified finder chart for 39 Cancri.

Visibility of 39 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 39 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: 70.0°
Max altitude: 58.5°
Azimuth: 290.0°
39 Cancri is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 39 Cancri

The image below is a photograph of 39 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 39 Cancri is -0.036 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 39 Cancri star
DSS2 image of 39 Cancri. The red arrow shows the motion of 39 Cancri during the next 10000 years (-6.00 arcmin in Right Ascension and -2.50 arcmin in declination);

Distance of 39 Cancri from the Sun and relative movement

39 Cancri is distant 587.39 light years from the Sun and it is moving far from the Sun at the speed of 35 kilometers per second.

180.18 pc
587.39 ly
35 km/s
-0.036 arcsec/year
-0.015 arcsec/year

Spectral properties of 39 Cancri

39 Cancri belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 39 Cancri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 39 Cancri. Attribution: Richard Powell / CC BY-SA

Alternative designations of 39 Cancri