Your guide to the Solar System and the night sky
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🌎  Greenwich, United Kingdom [change]

ο2 Centauri (omicron2 Centauri)

ο2 Centauri is a variable supergiant star in the constellation of Centaurus.

ο2 Centauri visual magnitude is 5.15. Because of its reltive faintness, ο2 Centauri 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 Centauri:

ο2 Centauri (omicron2 Centauri) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of ο2 Centauri

ο2 Centauri is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ο2 Centauri are provided in the following table:

11h 31m 48s
-59° 30’ 56”

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

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

Visibility of ο2 Centauri from your location

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

ο2 Centauri (omicron2 Centauri) is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of ο2 Centauri

The image below is a photograph of ο2 Centauri 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 Centauri is -0.008 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of ο2 Centauri (omicron2 Centauri) star
DSS2 image of ο2 Centauri. The red arrow shows the motion of ο2 Centauri during the next 100000 years (-13.33 arcmin in Right Ascension and 1.67 arcmin in declination);

Distance of ο2 Centauri from the Sun and relative movement

ο2 Centauri is distant 3,395.83 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

1,041.67 pc
3,395.83 ly
-17 km/s
-0.008 arcsec/year
0.001 arcsec/year

Spectral properties of ο2 Centauri

ο2 Centauri belongs to spectral class A2 and has a luminosity class of I corresponding to a supergiant star.


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

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

Alternative designations of ο2 Centauri

ο2 Centauri
(omicron2 Centauri)