Falcon 9 is an NSSL-certified Medium-lift launch vehicle capable of delivering up to 22,800 kilograms (50,265 lb) to orbit, competing with the Delta IV and the Atlas V rockets, as well as other launch providers around the world. It has nine Merlin engines in its first stage.[4] The Falcon 9 v1.0 rocket successfully reached orbit on its first attempt on 4 June 2010.