— Ch. 1 · Design Bureau Transitions —
Luna 9.
~3 min read · Ch. 1 of 6
The spacecraft and lander capsule combined weighed 1,000 kilograms and stood 2.7 meters tall. This engineering challenge fell to the design bureau known as OKB-1 under Chief Designer Sergei Korolev. Korolev died before the launch of Luna 9. The first eleven Luna missions failed for various reasons during that period. Project managers transferred the mission to the Lavochkin design bureau because OKB-1 focused on a human expedition to the Moon. Luna 9 marked the twelfth attempt at a soft landing by the Soviet Union. It became the first successful deep space probe built by the Lavochkin design bureau.
Rocket Launch Sequence
Luna 9 launched aboard a Molniya-M rocket with serial number 103-32 from Site 31/6 at Baikonur Cosmodrome. Liftoff occurred at 11:41:37 GMT on the 31st of January 1966 in the Kazakh Soviet Socialist Republic. The first three stages injected the payload into low Earth orbit at an altitude of 183 kilometers. The fourth stage Blok-L fired to raise the perigee to an apogee approximately 150,000 kilometers. On the 1st of February at 19:29 GMT, a mid-course correction took place involving a 48-second burn. This maneuver resulted in a delta-v change necessary for lunar insertion.Descent And Impact Dynamics
At an altitude of 100 kilometers from the Moon, the spacecraft oriented itself for retrorocket firing. An optomechanical system supported orientation using measurements of directions to the Sun and the Earth. At 10 kilometers above the surface, the radar altimeter triggered jettisoning of side modules. Airbags inflated while retro rockets fired simultaneously. About 2 meters from the surface, a contact sensor touched ground triggering engine shutdown. The capsule landed at coordinates 7.1 degrees north latitude and 64.3 degrees west longitude. It bounced several times before coming to rest in Oceanus Procellarum west of Reiner and Marius craters.