| タイトル | Brightening and Volatile Distribution Within Shackleton Crater Observed by the LRO Laser Altimeter. |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120009640 |
| 著者（英） | Fassett, C. I.; Torrence, M. H.; Head, J. W.; Tye, A. R.; Zuber, M. T.; Neumann, G. A.; Mazarico, E.; Aharonson, O.; Melosh, H. J.; Rosengurg, M. A.; Smith, D. E. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2012-03-19 |
| 言語 | eng |
| 内容記述 | Shackleton crater, whose interior lies largely in permanent shadow, is of interest due to its potential to sequester volatiles. Observations from the Lunar Orbiter Laser Altimeter onboard the Lunar Reconnaissance Orbiter have enabled an unprecedented topographic characterization, revealing Shackleton to be an ancient, unusually well-preserved simple crater whose interior walls are fresher than its floor and rim. Shackleton floor deposits are nearly the same age as the rim, suggesting little floor deposition since crater formation over 3 billion years ago. At 1064 nm the floor of Shackleton is brighter than the surrounding terrain and the interiors of nearby craters, but not as bright as the interior walls. The combined observations are explainable primarily by downslope movement of regolith on the walls exposing fresher underlying material. The relatively brighter crater floor is most simply explained by decreased space weathering due to shadowing, but a 1-mm-thick layer containing approx 20% surficial ice is an alternative possibility. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| レポートNO | GSFC.CP.00108.2012 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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