Cosmos 300
Launch Failure
Liftoff Time (GMT)
14:07:36
Tuesday September 23, 1969
Mission Details
Launch Notes
A valve of Block D did not close correctly following the first burn of the stage, and caused a spinning movement. The stage engines ignited automatically to stop this rotation, this until depletion of the propellants. The stage cannot perform the planned second ignition.
Cosmos 300
The Ye-8-5 is a version of the Ye-8 to drill a small sample of lunar soil and return it to earth. This could be launched in coordination with the L3S. Although not a manned lunar landing, it would provide a Soviet crew in orbit around the moon, and return of lunar soil to earth, nearly matching the Apollo mission. The last chance to upstage the Americans was a combined launch of the N1-L3S and Ye-8-5 before Apollo 11 in July.
Trans Lunar Injection
1 Payload
5,600 kilograms
Rocket
Manufacturer
KhrunichevRocket
Height: 56.14m
Payload to Orbit
LEO: 18,900 kg
GTO: 9,000 kg
Liftoff Thrust
8,840 Kilonewtons
Fairing
Diameter: 3.9m
Height: 8.9m
Stages
4
Launch Site
Stats
Proton-K
17th
Mission
8th
Mission of 1969
Khrunichev State Research and Production Space Center
432nd
Mission
58th
Mission of 1969
1969
93rd
Orbital launch attempt