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This cluster has always been in Triangulum Australe, as far as I am concerned. I viewed the the three big ellipticals in this cluster, many years ago; they were not hard at all in a 10 inch........ at around blue 13th magnitude each.
(ESO 137-010, ESO 137-008, etc.)
The X-ray luminosity, and the mass, of this cluster are comparable to that of the Coma Cluster, but it is strongly obscured by foreground dust, so perhaps some near-infrared imaging would be the best, if our imagers wish to capture it......I read somewhere that there are now some Japanese CCDs that have their maximum sensitivity at nearly 1 micron, and this longer wavelength of observation greatly reduces the effects of the considerable extinction, as the photons tend to get past the <0.25 micron dust particles.
The other fields in the supercluster, to the north of this cluster of galaxies, are very obscured by dust in the Milky Way, but there are a surprising number of fairly bright galaxies at a similar recession velocity, in the rest of Triangulum Australe......it is possible to trace the supercluster structure in a star atlas, using galaxies at a similar recession velocity to the cluster.......the supercluster extends from Triangulum Australe through to Ara and then into Pavo.
If you set your magnitude limit faint on an electronic star chart that shows much of the original PGC (~100,000 galaxies for the whole sky), the supercluster structure is quite obvious to the south and east of Abell 3627.
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