Atlas V is an active expendable launch system in the Atlas rocket family and is now operated by the Lockheed Martin-Boeing joint venture United Launch Alliance.Atlas V rocket uses a Russian-built RD-180 engine burning kerosene and liquid oxygen to power its first stage and and a Centaur Upper Stage. Thrust can be augmented with up to five strap-on solid rocket boosters, each providing an additional 1.27 meganewtons (285,500 lbf) of thrust for 94 seconds.
