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4 Vesta in Color: High Resolution Mapping from Dawn Framing Camera ImagesRotational surface variations on asteroid 4 Vesta have been known from ground-based and HST observations, and they have been interpreted as evidence of compositional diversity. NASA s Dawn mission entered orbit around Vesta on July 16, 2011 for a year-long global characterization. The framing cameras (FC) onboard the Dawn spacecraft will image the asteroid in one clear (broad) and seven narrow band filters covering the wavelength range between 0.4-1.0 microns. We present color mapping results from the Dawn FC observations of Vesta obtained during Survey orbit (approx.3000 km) and High-Altitude Mapping Orbit (HAMO) (approx.950 km). Our aim is to create global color maps of Vesta using multi spectral FC images to identify the spatial extent of compositional units and link them with other available data sets to extract the basic mineralogy. While the VIR spectrometer onboard Dawn has higher spectral resolution (864 channels) allowing precise mineralogical assessment of Vesta s surface, the FC has three times higher spatial resolution in any given orbital phase. In an effort to extract maximum information from FC data we have developed algorithms using laboratory spectra of pyroxenes and HED meteorites to derive parameters associated with the 1-micron absorption band wing. These parameters will help map the global distribution of compositionally related units on Vesta s surface. Interpretation of these units will involve the integration of FC and VIR data.
Document ID
20110023626
Acquisition Source
Johnson Space Center
Document Type
Abstract
Authors
Reddy, V. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
LeCorre, L. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Nathues, A. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Sierks, H. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Christensen, U. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Hoffmann, M. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Schroeder, S. E. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Vincent, J. B. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
McSween, H. Y. (Tennessee Univ. Knoxville, TN, United States)
Denevi, B. W. (Johns Hopkins Univ. Laurel, MD, United States)
Li, J.-Y. (Maryland Univ. MD, United States)
Pieters, C. M. (Brown Univ. Providence, RI, United States)
Gaffey, M. (North Dakota Univ. Grand Forks, ND, United States)
Mittlefehldt, D. (NASA Johnson Space Center Houston, TX, United States)
Buratti, B. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hicks, M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
McCord, T. (Bear Flight Center Winthrop, WA, United States)
Combe, J.-P. (Bear Flight Center Winthrop, WA, United States)
DeSantis, M. C. (Istituto di Astrofisica Spaziale e Fisica Cosmica (INAF-IASF) Rome, Italy)
Russell, C. T. (California Univ. Los Angeles, CA, United States)
Raymond, C. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Marques, P. Gutierrez (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Maue, T. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Hall, I. (Max-Planck-Inst. fuer Sonnensystemforschung Lindau, Germany)
Date Acquired
August 25, 2013
Publication Date
December 5, 2011
Subject Category
Astronomy
Report/Patent Number
JSC-CN-25373
Meeting Information
Meeting: Fall 2011 Meeting ofthe American Geophysical Union
Location: San Francisco, CA
Country: United States
Start Date: December 5, 2011
End Date: December 9, 2011
Sponsors: American Geophysical Union
Distribution Limits
Public
Copyright
Public Use Permitted.

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