Luna 10

Luna 10 (or Lunik 10) was a 1966 Soviet lunar robotic spacecraft mission in the Luna program. It was the first artificial satellite of the Moon.

Luna 10
Luna 10 mockup, Le Bourget (France)
Mission typeLunar orbiter
OperatorGSMZ Lavochkin
COSPAR ID1966-027A
SATCAT no.02126
Mission duration60 days
Spacecraft properties
Spacecraft typeE-6S
ManufacturerGSMZ Lavochkin
Launch mass1,583.7 kg
Dry mass540 kg
Start of mission
Launch date31 March 1966, 10:46:59 UTC
RocketMolniya-M 8K78M
Launch siteBaikonur, Site 31/6
End of mission
Last contact30 May 1966
Orbital parameters
Reference systemSelenocentric
Periselene altitude2088 km
Aposelene altitude2738 km
Inclination71.9°
Period178.05 minutes
Lunar orbiter
Orbital insertion3 April 1966, 18:44 GMT
Instruments
Magnetometer
Gamma-ray spectrometer
Five gas-discharge counters
Two ion traps/charged particle trap
Piezoelectric micrometeorite detector
Infrared detector
Low-energy x-ray photon counters
 

Luna 10 conducted extensive research in lunar orbit, gathering important data on the strength of the Moon's magnetic field, its radiation belts, and the nature of lunar rocks (which were found to be comparable to terrestrial basalt rocks), cosmic radiation, and micrometeoroid density. Perhaps its most important finding was the first evidence of mass concentrations (called "mascons") — areas of high density below the mare basins that distort lunar orbital trajectories. Their discovery has usually been credited to the American Lunar Orbiter series.

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