A little goes a long way—especially when you’re traveling 51,000 mph! On Feb. 1, 2017 NASA’s New Horizons spacecraft performed a 44-second thruster burn that adjusted its course by just under 1 mph toward its next target, the Kuiper Belt object 2014 MU69.

“One mile per hour may not sound like much,” said mission Principal Investigator Alan Stern, “but over the next 23 months, as we approach MU69, that maneuver will add up to an aim point refinement of almost six thousand miles (10,000 kilometers).”

New Horizons made its closest pass by Pluto on July 14, 2015. It will perform a similar flyby of the much smaller MU69 on Jan. 1, 2019.

Read the full story from NASA here: New Horizons Refines Course for Next Flyby