Live coverage: Atlas 5 countdown and launch journal

The United Launch Alliance Atlas 5 rocket that will hurl the four MMS satellites into a highly elliptical Earth orbit on March 12 has completed its basic build up at Cape Canaveral’s Complex 41 Vertical Integration Facility.

SpaceX is set to close out a record-breaking 2017 launch campaign Friday night with the delivery of 10 more Iridium voice and data relay satellites to orbit from Vandenberg Air Force Base, California.

Based upon an on-time launch Thursday, this is the timeline for Cygnus from liftoff through capture by the space station’s robotic arm.