Orbital ATK is scheduled to launch its ninth contracted mission to the International Space Station in a five-minute window beginning at 4:39 a.m. EDT, Monday, May 21 from NASA’s Wallops Flight Facility in Virginia.
Populations all along the U.S. east coast will have the chance to catch a glimpse of the Antares rocket as it blasts the Cygnus cargo spacecraft on the way to orbit. Follow this launch blog for the latest mission status updates.

Information for those planning to visit the NASA Wallops Visitor Center.
What time will it in the UK at lift off?
When it is 4:39 a.m. on May 21 on the U.S. East Coast, it will be 9:39 a.m. in the United Kingdom.
Will the rocket come up the coast to Ocean City, Md?
The Antares rocket’s trajectory takes it away from the area to the southeast, although good visibility should make it possible to see from Ocean City.
Am I understanding correctly that they’re planning on shifting the launch towards 0454? Or later?
4:44 a.m. EDT today, May 21, is the targeted liftoff.