| タイトル | Regolith Depth, Mobility, and Variability on Vesta from Dawn's Low Altitude Mapping Orbit |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120002978 |
| 著者（英） | Petro, N. E.; Denevi, B. W.; Buczkowski, D. L.; Schroeder, S.; Jaumann, R.; Williams, D. A.; Li, J.-Y.; Russell, C. T.; Blewett, D. T.; Schenk. P.; De Sanctis, M. C.; Raymond, C. A.; Sunshine, J. M.; Combe, J.-P.; Pieters, C. M.; Mittlefehldt, D. W.; Coman, E. I.; Marchi, S.; Schmedemann, N.; Nathues, A. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2012-01-01 |
| 言語 | eng |
| 内容記述 | Regolith, the fragmental debris layer formed from impact events of all sizes, covers the surface of all asteroids imaged by spacecraft to date. Here we use Framing Camera (FC) images [1] acquired by the Dawn spacecraft [2] from its low-altitude mapping orbit (LAMO) of 210 km (pixel scales of ~20 m) to characterize regolith depth, variability, and mobility on Vesta, and to locate areas of especially thin regolith and exposures of competent material. These results will help to evaluate how the surface of this differentiated asteroid has evolved over time, and provide key contextual information for understanding the origin and degree of mixing of the surficial materials for which compositions are estimated [3,4] and the causes of the relative spectral immaturity of the surface [5]. Vestan regolith samples, in the form of howardite meteorites, can be studied in the laboratory to provide complementary constraints on the regolith process [6]. |
| NASA分類 | Space Sciences (General) |
| レポートNO | JSC-CN-25700 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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