Video: X-37B payload mated to Atlas 5

Orbital ATK plans to launch its next two commercial resupply missions to the International Space Station on Atlas 5 rockets, grabbing a launch slot in March after a next-generation U.S. weather satellite was delayed, industry officials said.

A United Launch Alliance Atlas 5 rocket blasted off from Cape Canaveral at 11:05 p.m. EDT (0305 GMT) tonight to send Orbital ATK’s commercial Cygnus cargo freighter to the International Space Station. Follow the mission in our live journal.

An early bird rocket launch from the Florida spaceport will take to the skies before dawn Saturday when an Atlas 5 lofts a classified U.S. government satellite.