Live coverage of Northrop Grumman’s ninth operational Cygnus resupply flight to the International Space Station. Text updates will appear automatically below. Follow us on Twitter.
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Live coverage: NASA’s ICON satellite successfully launched
After a 24-hour delay due to poor weather, an air-launched Northrop Grumman Pegasus XL rocket fired into orbit at 9:59 p.m. EDT Thursday (0159 GMT Friday) after release from a carrier jet at an altitude of 39,000 feet over the Atlantic Ocean northeast of Cape Canaveral. The Pegasus rocket carried NASA’s ICON satellite into orbit to collect measurements of the ionosphere.