9-1 shows the positions of Mercury at inferior conjunctions during the 1977/85 period. ... The favorable years for transfers to Saturn are arrival in the 1970/76 period and then again in the 1999/2005 period whereas in the 1986/92 period, ... The planar projection of ^This comparison is valid for high-thrust systems, but not necessarily for very low thrust systems, such as ion drives, because shorter distancesanbsp;...
|Title||:||Study of interplanetary missions to Mercury through Saturn with emphasis on manned missions to Venus and Mars 1973/82 involving capture|
|Author||:||General Dynamics Corporation. Astronautics Division, Krafft A. Ehricke|