At 1040 GMT on 19 February 2016, the Cygnus OA-4 (Deke Slayton 2) cargo craft was unberthed from the Interionational Space Station’s Unity node, having first been filed with refuse, by the Canadarm-2 robot arm.The spacecraft was then released fully into orbit at about 1227 GMT on the same day. The Cygnus was deorbited to destruction via a fiery re-entry over the South Pacific at circa 1600 GMT on 20 February with any surviving debris safely falling into the ocean.
The Orbital ATK Cygnus OA-4 commercial mission, which flew on behalf of NASA using a new larger version of the Cygnus craft, was adjudged complete success.
