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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
north SunriseRise: 7:50  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cancer » 

45 Cancri

Altitude: 11.3°   Azimuth: 276.3°   Direction: West

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

45 Cancri visual magnitude is 5.64. Because of its reltive faintness, 45 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 45 Cancri:


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

Altitude: 11.3°
Azimuth: 276.3°
Direction: West

Celestial coordinates and finder chart of 45 Cancri

45 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 45 Cancri are provided in the following table:

08h 43m 12s
+12° 40’ 50”

The simplified sky map below shows the position of 45 Cancri in the sky:

Finder chart 45 Cancri star
Simplified finder chart for 45 Cancri.

Visibility of 45 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 45 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: 77.3°
Max altitude: 51.2°
Azimuth: 282.7°

Digitized Sky Survey image of 45 Cancri

The image below is a photograph of 45 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 45 Cancri is -0.012 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 45 Cancri star
DSS2 image of 45 Cancri. The red arrow shows the motion of 45 Cancri during the next 10000 years (-2.00 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of 45 Cancri from the Sun and relative movement

45 Cancri is distant 1,028.39 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

315.46 pc
1,028.39 ly
-13 km/s
-0.012 arcsec/year
0.002 arcsec/year

Spectral properties of 45 Cancri

45 Cancri belongs to spectral class A3 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 45 Cancri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 45 Cancri. Attribution: Richard Powell / CC BY-SA

Alternative designations of 45 Cancri