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Online moon atlas3/2/2023 ![]() ![]() At 101 hours, 36 minutes, when the LM was behind the moon on its 13th orbit, the LM descent engine fired for 30 seconds to provide retrograde thrust and commence descent orbit insertion, on a trajectory that was virtually identical to that flown by Apollo 10. On July 20, Armstrong and Aldrin entered the LM again, made a final check, and at 100 hours, 12 minutes into the flight, the Eagle undocked and separated from Columbia for visual inspection. Before this second SPS firing, another TV transmission was made, this time from the surface of the moon. Later, a second burn of the SPS for 17 seconds placed the docked vehicles into a lunar orbit, which was calculated to change the orbit of the CSM piloted by Collins. At about 75 hours, 50 minutes into the flight, a retrograde firing of the SPS for 357.5 seconds placed the spacecraft into an initial, elliptical-lunar orbit of 69 by 190 miles. On July 19, after Apollo 11 had flown behind the moon out of contact with Earth, they performed the first lunar orbit insertion manoeuvre. ![]() On July 18, Armstrong and Aldrin climbed through the docking tunnel from Columbia to Eagle to check out the LM, and to make the second TV transmission. The launch had been so successful that the other three were not needed. Later, on July 17, a three-second burn of the SPS was made to perform the second of four scheduled midcourse corrections programmed for the flight. The first colour TV transmission to Earth from Apollo 11 occurred during the translunar coast of the CSM/LM. The S-IVB stage separated and injected into heliocentric orbit 4 hours and 40 minutes into the flight. After transposition and jettisoning of the SLA panels on the S-IVB stage, the CSM docked with the LM. The command and service module, or CSM, Columbia separated from the stage, which included the spacecraft-lunar module adapter, or SLA, containing the lunar module, or LM, Eagle. 2 hours, 44 minutes and one-and-a-half revolutions after launch, the S-IVB stage reignited for a second burn of 5 minutes, 48 seconds, placing Apollo 11 into a translunar orbit. The way they came apart made the moon landing happen. Components of Saturn V were discarded one by one. ![]()
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