[microtherion]

OK, that would be a pretty conclusive evidence that the moon was the primary consideration. However, it's entirely possible that the name, when it was in the news, caught his attention because of the mythological background. Cf "Lilith", the first workstation he built. "Ceres" again both has astronomical and mythological connotations — I'm not sure whether Voyager encountered Ceres, though.

Wirth's love of the theater (and costume parties) was attested to by his family at the memorial service. It was not something that his students knew about him (maybe grad students did).