Tip of the red giant branch measurements based on Hubble Space Telescope and ground-based imaging have resulted in accurate distances to 29 galaxies in the nearby Centaurus A Group .
All but two of the 29 galaxies lie in either of two thin planes roughly parallel with the supergalactic equator .
The planes are only slightly tilted from the line-of-sight , leaving little ambiguity regarding the morphology of the structure .
The planes have characteristic r.m.s .
long axis dimensions of \sim 300 kpc and short axis dimensions of \sim 60 kpc , hence axial ratios \sim 0.2 , and are separated in the short axis direction by 303 kpc .

Keywords : galaxies : distances and redshifts — galaxies : groups ( Cen A ) — large-scale structure of universe