Dec 23, 2011

Dwayne Brown
Headquarters, Washington 202-358-1726 dwayne c brown@nasa gov

DC Agle Jet Propulsion Laboratory, Pasadena, Calif 818-393-9011 agle@jpl nasa gov

Caroline McCall Massachusetts Institute of Technology, Cambridge 617-253-1682 cmccall5@mit edu

MEDIA ADVISORY: M11-426

NASA TO HOST MEDIA TELECONFERENCE ON PROBES' MOON ORBIT INSERTION

PASADENA, Calif -- NASA will hold a media teleconference at 11 a m PST on Wednesday, Dec 28, to preview twin spacecraft being placed in orbit around the moon on New Year's Eve and New Year's Day

NASA's twin lunar Gravity Recovery and Interior Laboratory (GRAIL) probes were launched from Cape Canaveral Air Force Station on Sept 10, 2011 GRAIL-A is scheduled to arrive in lunar orbit beginning at 1:21 p m PST on Saturday, Dec 31, and GRAIL-B on Sunday, Jan 1, beginning at 2:05 p m PST After confirmation they are in orbit and operating nominally, the two solar-powered spacecraft will fly in tandem orbits to answer longstanding questions about the moon and give scientists a better understanding of how Earth and other rocky planets in the solar system formed

Participants are: - Maria Zuber, principal investigator, Massachusetts Institute of Technology, Cambridge - David Lehman, project manager, NASA's Jet Propulsion Laboratory (JPL), Pasadena, Calif

To participate, reporters must contact the JPL Media Relations Office at 818-354-5011 by 10:30 a m PST on Dec 28 for the call-in number and passcode

Audio of the teleconference will be streamed at:

http://www nasa gov/newsaudio

Supporting images will be available 15 minutes prior to the teleconference at:

http://1 usa gov/grailnews

For more information about GRAIL visit:

http://www nasa gov/grail

-end-

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