United Launch Alliance’s Delta IV Heavy rocket carrying a payload for the National Reconnaissance Office successfully lifted off from Space Launch Complex 37 at CCAFS at 9:47 p.m. EST today. This was the first Delta IV Heavy mission for the NRO. Designated NROL-26, the mission is in support of national defense. This was the third Delta IV Heavy launch in Delta program history. A Delta IV Heavy demonstration flight occurred in December 2004, and the first Air Force operational mission was launched in November 2007.

The ULA Delta IV Heavy vehicle featured a center common booster core with two strap-on common booster cores. Each common booster core was powered by the RS-68 cryogenic engine. An RL10B-2 cryogenic engine powered the second stage. Both engines are built by Pratt & Whitney Rocketdyne. The payload was encased by a 5-meter diameter (16.7-foot diameter) aluminum, tri-sector payload fairing. ULA constructed the Delta IV Heavy launch vehicle in Decatur, Ala.

This was the first launch for ULA in 2009. ULA’s next launch is NASA’s NOAA-N Prime mission currently scheduled for Feb. 4, aboard a Delta II from Space Launch Complex-2 at Vandenberg Air Force Base, Calif.