New Horizons Mission & Spacecraft Facts

New Horizons –

NASA’s New Horizons spacecraft is on a mission to collect data and images of the dwarf planet Pluto, its surrounding moons and other objects in the Kuiper Belt. An earlier mission, named the Pluto Kuiper Express, was cancelled by NASA in 2000 due to funding issues, yet six years later the New Horizons mission was launched.

Mission Profile

Launch Date: January 19th 2006
Target: Pluto Flyby
Closest Approach: July 14th 2015
Cost: $650 million

Facts about the New Horizons Mission

  • For all its scientific objectives to be accomplished the New Horizons spacecraft must pass through a circular region of space just 300 kilometres in diameter.
  • On February 28, 2007 New Horizons took advantage of Jupiter’s gravity to increase its speed by 4 kilometres a second. This manoeuvre is known as a gravity assist.
  • When the New Horizons mission was launched in 2006, Pluto was still classified as a planet. In August the same year it was reclassified as a dwarf planet by the International Astronomical Union because it failed to meet one of three requirements necessary for being classed as a planet.
  • At closest point on the 14th of July the spacecraft will be within 9,650 kilometres of Pluto’s centre of mass.
  • New Horizons is the fastest spacecraft launched, leaving the Earth with a speed of around 16.26 kilometres a second.
  • Only four other spacecraft have travelled as far away from Earth as New Horizons, they are Pioneer 10, Pioneer 11, Voyager 1 and Voyager 2.
  • While in the vicinity of Pluto it takes around 4 and a half hours for a radio signal from New Horizons to reach Earth.

Spacecraft Facts

New Horizons Labelled Diagram
New Horizons’ Instruments –
  • On passing Pluto the New Horizons spacecraft will have travelled 4.76 billion kilometres, the equivalent of 32 trips between the Earth and the Sun.
  • The spacecraft itself holds seven scientific instruments to capture and record data about Pluto, including information about its surface, atmosphere and interior.
  • The instruments carried by New Horizons include Ralph, which will help provide thermal maps of the dwarf planet, Alice, which is an ultraviolet imaging spectrometer and will analyse the atmosphere around Pluto and its moons and LORRI (LOng Range Reconnaissance Imager) which is a powerful telescopic camera that can obtain images and data from great distances.
  • As well as the scientific equipment and instruments carried by New Horizons, the spacecraft also carries several artefacts, including a U.S. flag, and an ounce of Clyde Tombaugh’s ashes. He is the man who discovered Pluto in 1930.
  • To reduce wear the spacecraft has spent much of its nine year journey in hibernation with checks to ensure the instruments still function and that it is on course.
  • Because the spacecraft is so far from the Sun, it cannot rely on sunlight to power itself. Instead, its power supply comes from what is called a radioisotope thermal generator.

More information:

Keep an eye on the Pluto Facts and Images pages for the latest updates from the new Horizons mission.

NASA Site:
Official Site:


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