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by natep 3982 days ago
Source on that? Even the Tajectory Correction Maneuvers (TCMs) are planned in advance, and it's just the details of the TCM that are finalized in the lead-up to those events.

As far as the final approach goes, the core sequence started July 7[1], and no adjustments were made to it. They even had a TCM opportunity before that in case of a possible collision, that I heard was skipped.

[1] http://www.spaceflight101.com/new-horizons-encounter-timelin...