CASSINI: The Grand Finale Saturn Tour: Where is Cassini Now? Latest Updates The final signal will take 83 minutes to reach Earth. End of Mission September 15, 2017 COMPLETED ___ Sept. 15, 2017 (5:45 a.m. PDT): Cassini has completed its mission at Saturn. As predicted, the spacecraft lost contact with Earth at 4:55 a.m. … Continue reading CASSINI: The Grand Finale