Saturday, July 18, 2009

Apollo+40: Overnight Status, 7/18

From the PAO Transcript, at about 6:00 AM 7/18/1969:

This is Apollo Control, 45 hours 28 minutes Ground Elapsed Time. A little more than an hour remaining in the Apollo 11 crew sleep period. Present velocity, 3799 feet per second. Distance from moon, 69 810 nautical miles. Apollo 11 will continue decelerating as it gets to the point
where the moon's sphere of influence overcomes the Earth's sphere of influence. This point will take place - This event will take place at 61 hours 39 minutes and 57 seconds Ground Elapsed Time, according to the Flight Dynamics Officer. At this point, the spacecraft-to-moon distance will be 33 822 nautical miles, spacecraft-to-Earth distance, 186 437 nautical miles. The velocity will have slowed to a relative crawl at this point. The Earth referenced 2990 feet per second, moon referenced 3772 feet per second. Clock counting down to lunar touchdown, which as mentioned before will likely be changed as the spacecraft goes into lunar orbit and the data is refined, some of the times change a few seconds one way or the other. At any rate, the landing clock now showing 57 hours 17 minutes until lunar landing. At 45 hours 30 minutes Ground Elapsed Time, this is Apollo Control.

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