Luna 12

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Luna 12
Mission typeLunar orbiter
OperatorSoviet space program
COSPAR ID 1966-094A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 02508 OOjs UI icon edit-ltr-progressive.svg
Mission duration89 days
Spacecraft properties
Spacecraft type E-6LF
Manufacturer GSMZ Lavochkin
Launch mass1,640 kilograms (3,620 lb) [1]
Start of mission
Launch dateOctober 22, 1966, 08:42:26 (1966-10-22UTC08:42:26Z) UTC [1]
Rocket Molniya-M 8K78M
Launch site Baikonur 31/6
End of mission
Last contactJanuary 19, 1967 (1967-01-20)
Orbital parameters
Reference system Selenocentric
Semi-major axis 2,404.5 kilometres (1,494.1 mi)
Eccentricity 0.31
Periselene altitude 1,871 kilometres (1,163 mi)
Aposelene altitude 2,938 kilometres (1,826 mi)
Inclination 10 degrees
Period 205 minutes
Lunar orbiter
Orbital insertionOctober 25, 1966, 20:45 UTC
Orbits602
  Luna 11
Luna 13  

Luna 12 (E-6LF series) was an uncrewed space mission of the Luna program, also called Lunik 12.

Contents

Overview

Luna 12 was launched towards the Moon onboard a Molniya-M and achieved lunar orbit on October 25, 1966. The spacecraft was equipped with a television system that obtained and transmitted photographs of the lunar surface. The photographs contained 1100 scan lines with a maximum resolution of 14.9-19.8 m. Pictures of the lunar surface were returned on October 27, 1966. The number of photographs is not known. Radio transmissions from Luna 12 ceased on January 19, 1967, after 602 lunar orbits and 302 radio transmissions.

Luna 12 was launched to complete the mission that Luna 11 had failed to accomplishtake high-resolution photos of the Moon's surface from lunar orbit. Luna 12 reached the Moon on October 25, 1966, and entered a 133 x 1,200-kilometer orbit. The Soviet press released the first photos taken of the surface on October 29pictures that showed the Sea of Rains and the Aristarchus crater. Resolution was as high as 15 to 20 meters. Film was developed, fixed, dried automatically, and scanned for transmission to Earth. No further photos were ever released. After completing its main imaging mission, Luna 12 was put into a spin-stabilized roll to carry out its scientific mission, which was successfully fulfilled.

Luna 12 was the first soviet probe where deliberate steps were taken to prevent interception of its signals by Jodrell Bank Observatory. [2] When the probe was in the field of view of the observatory it began switch its signals between two different frequencies, something Jodrell Bank was not able to follow. [2]

Legacy and status

On January 21, 1967, the Soviet news agency TASS announced that Luna 12 had completed its mission, breaking contact with ground stations. [3]

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References

  1. 1 2 Siddiqi, Asif (2018). Beyond Earth: A Chronicle of Deep Space Exploration, 1958–2016 (PDF) (second ed.). NASA History Program Office. ISBN   9781626830431.
  2. 1 2 Ulivi, Paolo; Harland, David M (2004). Lunar Exploration Human Pioneers and Robot Surveyors. Springer. p. 74. ISBN   185233746X.
  3. "Aeronautics and Astronautics, 1967" (PDF). NASA. p. 25. Archived (PDF) from the original on September 16, 2008. Retrieved December 21, 2021.