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Grey Hautaluoma/Ashley Edwards
Headquarters, Washington
202-358-0668/1756
grey.hautaluoma-1@nasa.gov, ashley.edwards-1@nasa.gov

Jonas Dino
Ames Research Center, Moffett Field, Calif.
650.604.5612
Jonas.Dino@nasa.gov

September 11, 2009
 
RELEASE : 09-118AR
 
 
NASA'S LCROSS Reveals Target Crater for Lunar South Pole Impacts
 
 
MOFFETT FIELD, Calif. – NASA has selected a final destination for its Lunar Crater Observation and Sensing Satellite, or LCROSS, after a journey of nearly 5.6 million miles that included several orbits around Earth and the moon. The mission team announced Wednesday that Cabeus A will be the target crater for the LCROSS dual impacts scheduled for 7:30 a.m. EDT on Oct. 9, 2009. The crater was selected after an extensive review as the optimal location for LCROSS' evaluation of whether water ice exists at the lunar south pole.

LCROSS will search for water ice by sending its spent upper-stage Centaur rocket to impact the permanently shadowed polar crater. The satellite will fly into the plume of dust left by the impact and measure the properties before also colliding with the lunar surface. The LCROSS team selected Cabeus A based on a set of conditions that include proper debris plume illumination for visibility from Earth, a high concentration of hydrogen, and mature crater features such as a flat floor, gentle slopes and the absence of large boulders.

"The selection of Cabeus A was a result of a vigorous debate within the lunar science community that included review of the latest data from Earth-based observatories and our fellow lunar missions Kaguya, Chandrayaan-1, and the Lunar Reconnaissance Orbiter," said Anthony Colaprete, LCROSS project scientist and principle investigator at NASA’s Ames Research Center in Moffett Field, Calif. "The team is looking forward to the impacts and the wealth of information this unique mission will produce."

A cadre of professional astronomers using many of the Earth’s most capable observatories is helping maximize the scientific return from the LCROSS impacts. These observatories include the Infrared Telescope Facility and Keck telescope in Hawaii; the Magdalena Ridge and Apache Ridge Observatories in New Mexico and the MMT Observatory in Arizona; the newly refurbished Hubble Space Telescope; and the Lunar Reconnaissance Orbiter, among others.

"These and several other telescopes participating in the LCROSS Observation Campaign will provide observations from different vantage points using different types of measurement techniques," said Jennifer Heldmann, lead for the LCROSS Observation Campaign at Ames. "These multiple observations will complement the LCROSS spacecraft data to help determine whether or not water ice exists in Cabeus A."

During a media briefing Sept. 11, Daniel Andrews, LCROSS project manager at Ames, provided a mission status update indicating the spacecraft is healthy and has enough fuel to successfully accomplish all mission objectives. Andrews also announced the dedication of the LCROSS mission to the memory of legendary news anchor, Walter Cronkite, who provided coverage of NASA's missions from the beginning of America's manned space program to the age of the space shuttle.

"Dad would sure be proud to be part, if just in name, of getting humans back up to the moon and beyond," said Chip Cronkite, son of the famed news anchor.

The LCROSS mission was selected in April 2006 as a mission manifested with the Lunar Reconnaissance Orbiter. Both missions launched on June 18, 2009 on an Atlas V from Cape Canaveral, Fla. The LCROSS mission and science operations are managed at Ames.

"The LCROSS team has long been preparing for its final destination on the moon, and we're looking forward to October 9," Andrews said. "The next 28 days will undoubtedly be very exciting."

For more information about the Lunar Crater Observation and Sensing Satellite Mission and images of Cabeus A, visit:

http://www.nasa.gov/lcross


Walter Cronkite Left: Legendary CBS newsman Walter Cronkite speaks in February 2004 at a ceremony at the National Air and Space Museum in Washington honoring the fallen astronauts of the STS-107 Columbia mission.
Credit: NASA/Bill Ingalls
Click image for full resolution.
Walter Cronkite Left: Legendary CBS newsman Walter Cronkite speaks at a ceremony at the National Air and Space Museum in Washington celebrating the 35th anniversary of Apollo 11 in 2004.
Credit: NASA/Bill Ingalls
Click image for full resolution.
Cabeus A crater Left: Close up image of crater Cabeus A near the moon’s south pole and show crater elevation. Yellow represents lower elevations. Scientists at NASA's Jet Propulsion Laboratory, Pasadena, Calif., created the map using radar data from the Deep Space Network's Goldstone Solar System Radar located in California's Mojave Desert. The image is from a new, very high resolution lunar topography map of the moon's rugged south polar region.
Credit: NASA/JPL
Click image for full resolution.
Cabeus A crater Left: Close up image depicting the slopes or steepness of the walls in Cabeus A. The image is from a new, very high resolution lunar topography map of the moon’s rugged south polar region.
Click image for full resolution.
Potential water concentrations on the south pole of the moon Left: Image of south pole Potential Water Concentrations based on data from Lunar Prospector. The blues and purples indicate the highest potential of water ice.
Credit: V. Eke, Durham University, L. Teodoro, University of Glasgow and ELORET/NASA Ames, R. Elphic, NASA/Ames.
Click image for full resolution.
Potential water concentrations on the south pole of the moon Left: Zoomed in image of south pole Potential Water Concentrations based on data from Lunar Prospector. The blues and purples indicate the highest potential of water ice.
Credit: V. Eke, Durham University, L. Teodoro, University of Glasgow and ELORET/NASA Ames, R. Elphic, NASA/Ames
Click image for full resolution.
South pole of the moon Left: Composite image of the South Pole taken by New Mexico State University/ Marshall Space Flight Center, using the Tortugas 24” telescope.
Credit: NMSU/MSFC
Click image for full resolution.
South pole of the moon Left: Labeled composite image of the South Pole taken by New Mexico State University/ Marshall Space Flight Center, using the Tortugas 24” telescope.
Credit: NMSU/MSFC
Click image for full resolution.

 

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