The first Delta 4 Heavy rocket lifted off from Cape Canaveral Tuesday evening, but it appears there was a glitch that put the rocket’s satellite payload into an incorrect orbit. The rocket’s first stage shut down 8 seconds earlier than expected, so the upper stage was fired longer than originally planned to compensate. Flight controllers still haven’t made an official announcement about the demonstration payload it was carrying, but two additional nanosatellites haven’t made contact yet. NASA is considering this vehicle as a potential replacement for some of the space shuttle’s cargo carrying duties, so the launch was being watched carefully.