Rahul Sharma (Editor)

Luna 4

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Mission type
  
Lunar lander

COSPAR ID
  
1963-008B

Mission duration
  
5 days (planned)

Period
  
28 days

Launch date
  
2 April 1963

Operator
  
Soviet Union

SATCAT no.
  
566

Inclination
  
65°

Launch mass
  
1,422 kg

Launch site
  
Baikonur Cosmodrome

Luna 4 httpsuploadwikimediaorgwikipediacommonsthu

Reference system
  
Barycentric (Earth-Moon system)

Manufacturer
  
S. P. Korolev Rocket and Space Corporation Energia

Similar
  
Luna 3, Luna 2, Luna 1, Luna 10, Luna 17

Luna 4, or E-6 No.4 was a Soviet spacecraft launched as part of the Luna program to attempt the first soft landing on the Moon. Following a successful launch, the spacecraft failed to perform a course correction and as a result it missed the moon, remaining instead in Earth orbit.

Contents

Mission

Luna 4 was launched by a Molniya-L carrier rocket at 08:16:37 UTC on 2 April 1963. Launch occurred from Site 1/5 at the Baikonur Cosmodrome. After reaching an initial parking orbit of 167 by 182 kilometres (104 by 113 mi), the rocket's upper stage restarted to place Luna 4 onto a translunar trajectory.

The spacecraft did not perform a required midcourse correction manoeuvre, which resulted in it missing the Moon by 8,336.2 kilometres (5,179.9 mi) at 13:25 UT on April 5, 1963. It then entered a barycentric 90,000 × 700,000 km Earth orbit. A lecture program entitled "Hitting the Moon" was scheduled to be broadcast on Radio Moscow at 7:45 p.m. the evening of April 5 but was cancelled. The spacecraft transmitted at 183.6 MHz at least until April 6.

Lunar surface close-up photography

The purpose of this experiment was to obtain information on the characteristics of the lunar surface. These characteristics include the amount of cratering, structure and size of craters, the amount, distribution, and sizes of ejecta, mechanical properties of the surface such as bearing strength, cohesiveness, compaction, etc. Determination and recognition of processes operating to produce the lunar surface features also were among the objectives of this photographic experiment.

References

Luna 4 Wikipedia


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