The Catalogue of Southern Ringed Galaxies (CSRG) is a major compilation of angular ring diameters
and other information for 3,692 galaxies south of declination -20 degrees. The goal was to derive
the intrinsic shapes and orientations of galactic rings using distributions of apparent
shapes and orientations. The main results of the study are summarized
Ringed barred spiral galaxy NGC 1433 in Horologium. The ring is the large oval structure surrounding the prominent bar.
Ronald J. Buta,
The Catalogue of Southern Ringed Galaxies, by Ronald J. Buta, Astrophysical Journal Supplement Series, vol. 96, p. 39, 1995
Data Files (from data archive at NGC/IC website)