NASA’s Dawn spacecraft entered
orbit of the inner main belt asteroid 4 Vesta on July 16,
2011, and is spending one year in orbit to characterize
the geology, chemical and mineralogical composition,
topography, shape, and internal structure of Vesta before
departing to asteroid 1 Ceres in late 2012. As part
of the Dawn data analysis the Science Team is conducting
geological mapping of the surface, in the form
of 15 quadrangle maps. This abstract reports results
from the mapping of quadrangle Av-8, named Marcia.
Data: The base for mapping this quadrangle is a
monochrome Framing Camera (FC) mosaic produced
from the High Altitude Mapping Orbit (HAMO) data
with a spatial resolution of ~70 m/pixel. This base is
supplemented by a Digital Terrain Model (DTM) derived
from Survey orbit stereo image data with a lateral
spacing of 450 m/pixel (10 pixels per degree) and a
vertical accuracy of ~30 meters. Also used to support
the mapping are FC color ratio images from the Survey
orbit with a spatial resolution of ~250 m/pixel, slope
and contour maps derived from the DTM, and Visible
and InfraRed (VIR) hyperspectral images from the
Survey and HAMO orbits with spatial resolutions of
700 and 200 m/pixel, respectively
