What does this number measure?
A vast cluster of old stars associated with the Milky Way. Omega Centauri contains a very large number of stars concentrated in a common region. Its diameter depends on the boundary chosen for its stellar envelope.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
Omega Centauri: interpretation of a globular cluster; approximate density, stellar colours and boundary.