OSIRIS-REx launch as seen from NASA Press Site

Set to fly in its most powerful configuration with five solid rocket boosters, a United Launch Alliance Atlas 5 rocket rolled out to Cape Canaveral’s Complex 41 launch pad Tuesday in preparation for a planned blastoff two days later with a U.S. military communications satellite.

The U.S. Air Force on Friday made its first public confirmation that the X-37B unmanned space shuttle will be launched next month on the fourth flight of an Orbital Test Vehicle.

The 27 Kuiper satellites will head to low Earth orbit on an Atlas 5 rocket flying in a 551 configuration, using five solid rocket boosters. ULA launched its rocket at 6:54 a.m. EDT (1054 UTC) on Monday, June 23.