The Lunar Orbiter contained a cosmonaut's pressurized cabin, a compartment accommodating attitude control engines and a passive docking mechanism, an instrumentation compartment, a lunar descent module, and rocket stage E. The Lunar Orbiter was powered from chemical storage batteries installed on a frame on the descent module exterior and in the instrumentation compartment. A control system was based on the onboard computer and was provided with manual controllers enabling a cosmonaut to choose independently a landing site relying on his visual observation through a window. The lunar landing module was of an unconventional four-leg design containing honeycomb absorbers of residual vertical landing velocity.

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1. Lunar descent module 2. Rocket stage E 3. Cosmonaut cabin 4. Life Support System equipment 5. Device for observation at landing 6. Attitude control engines 7. Thermal Control System radiator 8. Docking mechanism 9. Targeting sensor 10. Alignment sensors 11. Instrumentation compartment 12. TV camera 13. Omni-directional antennas 14. Power sources 15. Support stand with damper 16. Strut with damper 17. Landing radio radar 18. Strap-on instrumentation compartment 19. Low-gain antennas 20. Rendezvous system antennas 21. TV antennas 22. Post-force engine 23. Main engine 24. Reflector 25. Backup engine

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