It is not the fastest speed recorded for a spacecraft, which as of 2023 is that of the Parker Solar Probe. It was the fastest (average speed with respect to Earth) human-made object ever launched from Earth. On January 19, 2006, New Horizons was launched from Cape Canaveral Space Force Station by an Atlas V rocket directly into an Earth-and-solar escape trajectory with a speed of about 16.26 km/s (10.10 mi/s 58,500 km/h 36,400 mph).
It is the fifth space probe to achieve the escape velocity needed to leave the Solar System. Engineered by the Johns Hopkins University Applied Physics Laboratory (APL) and the Southwest Research Institute (SwRI), with a team led by Alan Stern, the spacecraft was launched in 2006 with the primary mission to perform a flyby study of the Pluto system in 2015, and a secondary mission to fly by and study one or more other Kuiper belt objects (KBOs) in the decade to follow, which became a mission to 486958 Arrokoth. New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program.
Pluto Energetic Particle Spectrometer Science Investigation