What date was the member of Cluster & Eno that did come from Cluster born on?
After the Heat: After The Heat is a 1978 album by Brian Eno, Dieter Moebius and Hans-Joachim Roedelius (the latter two being the core members of Cluster), credited to "Eno Moebius Roedelius". After the Heat:  The album represents the second collaboration by the trio, the first being 1977's "Cluster & Eno".
i don't know