- Luna 10
Luna 10 (E-6S series) was an
unmanned space missionof the Luna program, also called Lunik 10.The Luna 10 spacecraft was launched towards the Moonfrom an Earth orbiting platform on March 31, 1966. It was the first artificial satellite of the Moon (or another heavenly body, for that matter). The spacecraft entered lunar orbit on April 3, 1966and completed its first orbit 3 hours later (on April 4, Moscowtime). Scientific instruments included a gamma-ray spectrometerfor energies between 0.3—3 MeV (50–500 pJ), a triaxial magnetometer, a meteoritedetector, instruments for solar-plasma studies, and devices for measuring infraredemissions from the Moon and radiation conditions of the lunar environment. Gravitational studies were also conducted. The spacecraft played back to Earth " The Internationale" during the Twenty-third Congress of the Communist Party of the Soviet Union. Luna 10 was battery powered and operated for 460 lunar orbits and 219 active data transmissions before radio signals were discontinued on May 30, 1966.
After a midcourse correction on
1 April, Luna 10, the second of two hastily prepared Soviet Ye-6S probes (that is, the backup), successfully entered lunar orbit two days later at 18:44 UT, thus becoming the first man-made object to go into orbit around another planetary body. A 245-kilogram instrument compartment separated from the main bus, which was in a 350 x 1,000-kilometer orbit inclined at 71.9° to the lunar equator. The spacecraft carried a set ofsolid-state oscillators that had been programmed to reproduce the notes of the Internationaleso that it could be broadcast live to the 23rd Communist Party Congress. During a rehearsal on the night of 3 April, the playback went well, but the following morning, controllers discovered a missing note and played the previous night’s tape to the assembled gathering at the Congress—claiming it was a live broadcast from the Moon. Luna 10 conducted extensive research in lunar orbit, gathering important data on the weakness of the Moon’s magnetic field, its radiation belts, and the nature of lunar rocks (which were found to be comparable to terrestrial basaltrocks), cosmic radiation, and micrometeoroiddensity. 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. Last contactwas on 30 May 1966.
1966-03-31at 10:48:00 UTC
*On-orbit dry mass: 540 kg
* [http://www.zarya.info/Diaries/Luna/Luna10.php Zarya - Luna 10 chronology]
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