A United Launch Alliance Atlas V rocket has launched a spy satellite for the U.S. National Reconnaissance Office.
The rocket’s upper stage features a single-engine Centaur system manufactured by Aerojet Rocketdyne. The second-stage power system uses no solid rocket boosters.
The ULA launch — the latest in a series of recon-sat missions — was originally scheduled for December. Postponements were due to matters including unspecified second-stage rocket issues.
Second-stage separation came some four minutes after liftoff. Post-launch details weren’t available for the classified mission.