Flight 198 is the 54th Ariane 5 launch and the fifth in 2010. An ARIANE 5 ECA (Cryogenic Evolution type A), the most powerful version in the ARIANE 5 range, will be used for this flight.
Flight 198 is a commercial mission for Ariane 5. Launcher 556, the 50th production phase ARIANE 5, is the twenty-eighth of the 30 PA contract launchers, for which AIRBUS DEFENCE AND SPACE is production prime contractor. 556 is consequently the twenty-ninth complete launcher to be delivered to Arianespace, integrated and checked out under AIRBUS DEFENCE AND SPACE responsibility in the Launcher Integration Building (BIL).
In a dual-payload configuration using the SYLDA 5 “A” system and a long pattern fairing (total height: 17 m), the launcher is the satellites INTELSAT 17 in the upper position and HYLAS in the lower position.