5
$\begingroup$

If something would have gone wrong after a successful Moon landing requiring to ascent as soon as possible, what about the launch window for the lunar rendezvous maneuver? Could they ascent at any time or only in a short interval of the orbit period of the Command Module?

One lunar orbit of Apollo 8 took about two hours with 45 minutes without radio contact to Earth. See the answer to this question for the average orbit periods of all Apollo lunar orbits very close to two hours.

The launch window for LM might have been about 15 to 30 minutes every two hours, is that right?

$\endgroup$
3
$\begingroup$

The launch window for LM might have been about 15 to 30 minutes every two hours, is that right?

Not necessarily. Assuming the lunar module could sustain the astronauts for the needed time, the lunar and command service modules could have performed orbit phasing to rendezvous with each other with either the LM or CSM performing the orbital adjustments to slow down or speed up to intercept each other. This would take more time than desired, but very possible and the ability of the CSM to perform rescue maneuvers was designed into the mission. This would not be as optimal as taking off in the ideal window of time, but would be possible.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.