Abstract
ABSTRACT Redshifts have been measured for galaxies in four southern Abell clusters: A266, A2361, A2362, and A2661. Their average heliocentric values are: 28473, 18418, 18127, and 19060 km/s, respectively. A2361 and A2362 have a projected separation of just 1.3/h Mpc, which would make them among the tightest known binary clusters. Unless the single galaxy measured is in the foreground, A2661 is much closer than its D = 6 classification suggests. This casts further doubt on the reality of the putative association of distant rich clusters of which it was thought to be a member.
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