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: 4:52  
clear_day Transit: 12:55  
SunsetSet: 20:59 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Cancer » 

σ2 Cancri (sigma2 Cancri)

σ2 Cancri is a sub-giant star in the constellation of Cancer.

σ2 Cancri visual magnitude is 5.45. Because of its reltive faintness, σ2 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 σ2 Cancri:

σ2 Cancri (sigma2 Cancri) is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 15°.

Celestial coordinates and finder chart of σ2 Cancri

σ2 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 σ2 Cancri are provided in the following table:

08h 56m 56s
+32° 54’ 37”

The simplified sky map below shows the position of σ2 Cancri in the sky:

Finder chart σ2 Cancri (sigma2 Cancri) star
Simplified finder chart for σ2 Cancri (sigma2 Cancri).

Visibility of σ2 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 σ2 Cancri (sigma2 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: 57.1°
Max altitude: 71.4°
Azimuth: 302.9°
σ2 Cancri (sigma2 Cancri) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of σ2 Cancri

The image below is a photograph of σ2 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 σ2 Cancri is -0.048 arcsec per year in Right Ascension and -0.068 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of σ2 Cancri (sigma2 Cancri) star
DSS2 image of σ2 Cancri. The red arrow shows the motion of σ2 Cancri during the next 10000 years (-8.00 arcmin in Right Ascension and -11.33 arcmin in declination);

Distance of σ2 Cancri from the Sun and relative movement

σ2 Cancri is distant 194.86 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

59.77 pc
194.86 ly
5 km/s
-0.048 arcsec/year
-0.068 arcsec/year

Spectral properties of σ2 Cancri

σ2 Cancri belongs to spectral class A7 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where σ2 Cancri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of σ2 Cancri. Attribution: Richard Powell / CC BY-SA

Alternative designations of σ2 Cancri

σ2 Cancri
(sigma2 Cancri)