Ranger 4

Ranger 4 was a spacecraft of the U.S. space agency NASA. She was the fourth probe as part of the Ranger program for exploration of the moon. She was, like her predecessor, built in the so-called block -2- Design and weighed 331 kg. Objective of the mission was to take pictures of the lunar surface and to transmit to Earth. This should be done in the last ten minutes before the impact. In addition, a capsule should be ejected just before impact, which should make seismic investigations of the moon.

The Mission

Ranger 4 was launched on 23 April 1962 by the launch pad LC -12 at Cape Canaveral Air Force Station aboard an Atlas - Agena B rocket.

After the successful launch of the probe headed for the moon. However, the probe did not respond to radio signals, since a timer to control the on-board computer failed, so that certain maneuvers could not be started or run. The probe went into a tailspin and not stabilized. After some time, their power collapsed because the batteries were depleted and the solar panels had not deployed. On April 26, 1962 Ranger 4 crashed on the moon.

Swell

  • NASA: Ranger 4 (English )
  • Bernd Leitenberg: The Ranger lunar probes
  • Lunar Impact - A History of Project Ranger, online version of a NASA Code ( English)

Ranger 1 | 2 Ranger | Ranger 3 | 4 Ranger | Ranger 5 | 6 Ranger | Ranger 7 | 8 Ranger | Ranger 9

Cosmos 60 Cosmos • 111 • 300 • Cosmos Cosmos 305

Luna Luna 4 • 5 • 6 • Luna Luna Luna 7 • 8 • 9 • Luna Luna 10 Luna 11 • • • Luna 12 Luna 13 Luna 14 • • • Luna 15 Luna 16 Luna 17 • • • Luna 18 Luna 19 Luna 20 • • 21 • 22 • 23 • 24 • Luna Luna Luna 25 • • 1958a 1958b Luna Luna 1958C • • • Luna Luna 1959a 1960A • Luna Luna 1963A 1960B • • • Luna Luna 1964a 1964b 1965a • 1968a • Luna • • 1969a • 1970a 1969b • 1975a • Luna -Grunt - 1 • Luna -Grunt -2 • Luna - Resurs -2

Lunar Orbiter 1 Lunar Orbiter • 2 • 3 • Lunar Orbiter Lunar Orbiter 4 Lunar Orbiter • 5

Lunik Lunik 1 • 2 • 3 • Lunik Lunik 1958a 1958b Lunik • • • 1958C Lunik Lunik 1959a • • Lunik Lunik 1960A 1960B

Pioneer Pioneer 0 • 1 • 2 • Pioneer Pioneer Pioneer 3 • 4 • Pioneer • Pioneer P-1 P-3 P-30 • Pioneer • Pioneer P-31

Ranger Ranger 1 • 2 • 3 • Ranger Ranger Ranger 4 • 5 • 6 • Ranger Ranger Ranger 7 • 8 • 9 Ranger

Surveyor 1 Surveyor 2 • • • Surveyor 3 Surveyor 4 Surveyor • 5 • 6 • Surveyor Surveyor 7

• • 1967a 1967b 1968a 1968b • • 1969a • 3 • 4 • 5 • 6 • 7 • 8

AsiaSat 3 • Chandrayaan -1 Chandrayaan -2 • • • Chang'e -1 Chang'e -2 • Chang'e -3 • Clementine • ESMO • Explorer 33 Explorer 35 • • Google Lunar X-Prize GRAIL • • • Hiten Kaguya • LEO • LUNAR - A • ladee • • LCROSS Lunar Prospector Lunar Reconnaissance Orbiter • • • Moonlite Explorer 49 • SMART - 1 • 2 • Selene - Sputnik 25

See also: Chronology of lunar missions

  • NASA
  • Lunar probe
  • Space mission in 1962
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