0557 GMT (1:57 a.m. EDT)
Mission control has erupted into applause, confirming a successful impact!
0553 GMT (1:53 a.m. EDT)
A stream of pictures are flooding into the Jet Propulsion Laboratory from the impactor of its final moments before smashing into oblivion.
0552 GMT (1:52 a.m. EDT)
Telemetry lock with the impactor has been lost.