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The correct designation for this planet is WASP-4b, with no spaces. This is used by SIMBAD [1], the discovery paper [2], and the SuperWASP web site [3]. The use by the Extrasolar Planets Enyclopaedia of a space is inconclusive since this source uniformly uses lower-case letters preceded by a space for planet designators even when, as in the case of PSR B1257+12, this is definitely wrong. (According to this discussion, this is due to a software limitation.) Also, see my remarks at Talk:WASP-12b. Spacepotato ( talk) 17:55, 29 June 2008 (UTC) reply