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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: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Cancer » 

ο2 Cancri (omicron2 Cancri)

Altitude: 45.8°   Azimuth: 227.6°   Direction: South-West

ο2 Cancri is a hypergiant star in the constellation of Cancer.

ο2 Cancri visual magnitude is 5.67. Because of its reltive faintness, ο2 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 ο2 Cancri:


ο2 Cancri (omicron2 Cancri) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 45.8°
Azimuth: 227.6°
Direction: South-West

Celestial coordinates and finder chart of ο2 Cancri

ο2 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 ο2 Cancri are provided in the following table:

08h 57m 35s
+15° 34’ 53”

The simplified sky map below shows the position of ο2 Cancri in the sky:

Finder chart ο2 Cancri (omicron2 Cancri) star
Simplified finder chart for ο2 Cancri (omicron2 Cancri).

Visibility of ο2 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 ο2 Cancri (omicron2 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: 74.4°
Max altitude: 54.1°
Azimuth: 285.6°

Digitized Sky Survey image of ο2 Cancri

The image below is a photograph of ο2 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 ο2 Cancri is 0.058 arcsec per year in Right Ascension and 0.029 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ο2 Cancri (omicron2 Cancri) star
DSS2 image of ο2 Cancri. The red arrow shows the motion of ο2 Cancri during the next 10000 years (9.67 arcmin in Right Ascension and 4.83 arcmin in declination);

Distance of ο2 Cancri from the Sun and relative movement

ο2 Cancri is distant 160.59 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

49.26 pc
160.59 ly
-4 km/s
0.058 arcsec/year
0.029 arcsec/year

Spectral properties of ο2 Cancri

ο2 Cancri belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where ο2 Cancri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ο2 Cancri. Attribution: Richard Powell / CC BY-SA

Alternative designations of ο2 Cancri

ο2 Cancri
(omicron2 Cancri)