Luna 12 - Definition

Luna 12

Organization:	Soviet Union
Major Contractors:	GSMZ Lavochkin
Mission Type:	Planetary Science Lunar Orbit
Satellite of:	Moon
Launch:	October 22, 1966 at 08:38:00 UTC
Launch Vehicle:	Molniya 8K78M (4-Stage R-7 / SS-6)
Mission Highlight:	Entered lunar orbit on October 25, 1966, 20:45 UTC
Mission Duration:	89-days. Last contact January 19, 1967
Mass:	1,620 kg
NSSDC ID:	1966-094A
Webpage:	NASA NSSDC Master Catalog (http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1966-094A)
Orbital elements
Semimajor Axis:	2,404.5 km
Eccentricity:	.31
Inclination:	10°
Orbital Period:	205 minutes
Apogee:	1,200 km
Perigee:	133 km
Orbits:	602
Instruments
Imaging system :	Lunar photography
Gamma-ray spectrometer :
Magnetometer :
Radiation detectors :
Infrared radiometer :
Meteoroid detector :
R-1 transmission experiment :

Luna 12 was an unmanned space mission of the Luna program, also called Lunik 12. Luna 12 was launched towards the Moon from an Earth-orbiting platform 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 accomplish— take high-resolution photos of the Moon’s surface from lunar orbit. Luna 12 successfully reached the Moon on 25 October 1966 and entered a 133 x 1,200-kilometer orbit. The Soviet press released the first photos taken of the surface on 29 October—pictures 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 fulfilled quite successfully. Contact was finally lost on 19 January 1967 after 302 communications sessions.

• Launch Date/Time: 1966-10-22 at 08:38:00 UTC
• On-orbit dry mass: 1620 kg

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