who launched it?
NASA
Introduction
New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program. 
large objects ( 10 m) in space originating from a region between jupiter and mars Asteroid belt can you explain its structure? Asteroids become darker and redder with age due to space weathering. Composition is calculated from three primary sources: albedo, surface spectrum, and density. how is it classified into groups? Orbital classification; Quasi-satellites and horseshoe objects ; Spectral classification can you name a belt with similar properties? Kuiper belt who discovered this? David Jewitt have there been any missions conducted to study it? Yes - 'New Horizons' was launched on January 19, 2006 -the first spacecraft to explore the Kuiper belt
Launched by NASA NASA NASA.
New Horizons New Horizons New Horizons
Introduction Introduction Introduction
New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program. Engineered by the Johns Hopkins University Applied Physics Laboratory (APL) and the Southwest Research Institute (SwRI), with a team led by S.  New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program.  New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program. 
wiki:19139984
New Horizons [SEP] Introduction
New Horizons is an interplanetary space probe that was launched as a part of NASA's New Frontiers program. Engineered by the Johns Hopkins University Applied Physics Laboratory (APL) and the Southwest Research Institute (SwRI), with a team led by S. 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. It is the fifth space probe to achieve the escape velocity needed to leave the Solar System.