Lunar Section        


More GRAIL info

More information about the upcoming GRAIL impacts is also available at

The impacts will occur at 22:29 UT, seperated by 20 seconds.  The spacecraft are small, so nothing is expected to be visible, although the impact occurs in the dark.  Because it’s waxing crescent, it will be daylight or twilight in most locations where the moon is above the horizon.  LRO will image the site both before and after impact.

Thanks again to Mike Mattei for pointing out this web-site.


NASA live commentary during GRAIL impact

Mike Mattei brought this announcement of live commentary during the impact of the GRAIL spacecraft to my attention.  The site for the impacts is near the northern crater Goldschmidt, which will be in darkness at the time.

NASA to Provide Dec. 17 Commentary as Twin Probes End Lunar Mission

12/14/2012 12:00 AM EST

NASA will provide live commentary of the scheduled lunar surface impacts of its twin Gravity Recovery and Interior Laboratory (GRAIL) spacecraft beginning at 2 p.m. PST (5 p.m. EST) Monday, Dec. 17.


GRAIL impact update

More information about the upcoming impact of the GRAIL spaceccraft can be found at

Twin NASA Probes Prepare for Dec. 17 Mission-Ending Moon Impact

Thanks again Mike.

Wayne Bailey


NASA GRAIL impact teleconference

The two GRAIL (Gravity Recovery and Interior Laboratory) spacecraft are scheduled to impact the moon on December 17th.   Thanks to Mike Mattei for bringing the announcement of a teleconference to provide an overview of events to my attention.

NASA to Host Dec.13 Teleconference on Twin Probes Mission Ending Moon Impact

NASA will host a media teleconference at 10:30 a.m. PST (1:30 p.m. EST) Thursday, Dec. 13, to provide an overview of events leading up to twin spacecraft being commanded to impact the moon’s surface on Dec. 17 at approximately 2:28 p.m.


December TLO is available

The December 2012 issue of the A.L.P.O. Lunar Section’s monthly newsletter,
The Lunar Observer, has been uploaded to:

Thanks to all who contributed,

Wayne Bailey,
Editor, TLO

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