It had the highest launch velocity of any man made object at over 16km/s relative to earth.

New Horizons was launched on January 19, 2006, directly into an Earth-and-solar-escape trajectory with an Earth-relative velocity of about after its last engine was shut down. Thanks to a novel occultation campaign, the New Horizons mission has set its trajectory for the first-ever flyby of a remote Kuiper Belt Object (KBO).

New Horizons was launched on 19th January 2006 directly into an Earth-and-Solar-escape trajectory. Introduction New Horizons (NH) is the first mission to explore the Pluto system. On January 1, 2019, the New Horizons spacecraft intends to fly past 2014 MU69, a small KBO that lies a billion miles farther from the sun than Pluto and more than four billion miles from Earth. Keywords: New Horizons, Pluto Flyby, Trajectory Design, Mission Design, Trajectory Correction Maneuver, Flight Path Control. It had the highest launch velocity of any man made object at over 16km/s relative to earth. New Horizons has set a new bar for state-of-the-art spacecraft navigation.” Figure 28: This image, taken by LORRI (Long-Range Reconnaissance Imager), is the most detailed of Ultima Thule returned so far by the New Horizons spacecraft.

New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program. The NH spacecraft made the flyby of the Pluto system on July 14, 2015 after a long journey, traveling 5.25 billion kilometers across the solar system for over 9.5 years. 1.

Thus, the spacecraft left Earth at the greatest-ever launch speed for a man-made object. Because of that, New Horizons may not need fuel being reserved to adjust the spacecraft’s trajectory for the flyby.