LMASSONN@ESOC.BITNET (Lutz Massonne) (06/17/91)
As far as I remember, ICE used MOON fly-bys to get away from its Lagrange point position. That was a rather complicated task (NASA produced a nice brochure showing the very complex orbit as they needed a lot of moon fly-bys to achieve the orbital velocity to get away from earth) to re-use this probe never foreseen to be a comet explorer, but Giotto really did the first controlled earth-gravity assist manoeuvre (shortly before Galileo :-) ). Regards, Lutz Massonne