Beschreibung : ESA Giotto mark assigned to Halley`s comet study. Launch by Ariane 1, the Giotto probe was controlled from the European Space Agency ESOC facilities in Darmstadt (then West Germany) initially in Geostationary Transfer Orbit (GTO) then in the Near Earth Phase (NEP) before the longer Cruise Phase through to the encounter. While in GTO a number of slew and spin-up manoeuvres (to 90 RPM) were carried out in preparation for the firing of the Apogee Boost Motor (ABM), although unlike orbit circularisations for geostationary orbit, the ABM for Giotto was fired at perigee.

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ARIANE V 14 (ARIANE 1) · GIOTTO (PROBE) · HALLEY`s COMET