Shielded from view within the protective rocket nose cone, a covert surveillance satellite has been mounted atop a Delta 4-Heavy rocket for launch June 4.

NASA’s Juno spacecraft will stay in its current long-period orbit around Jupiter until at least February, and perhaps longer, as engineers study balky valves inside the science probe’s propulsion system and an unexpected computer reboot that interrupted key functions of the orbiter earlier this month.

The United Launch Alliance Delta 4 rocket has taken off tonight from Cape Canaveral, headed for space to deploy a satellite bought by allied nations to bolster the U.S. military global communications infrastructure.