This video from NASA's Dawn mission shows that the gravity field of
Vesta closely matches the surface topography of the giant asteroid
Vesta. The video shows shaded topography from Dawn's framing camera on
the left, with troughs and craters visible, and color-contoured data
from Dawn's gravity experiment on the right. Red shows the areas with a
higher than average gravity field and blue-purple shows the areas where
the field is weaker on average. The highest topography, on the rim of
the Rheasilvia basin deep in the southern hemisphere, shows a
particularly strong gravity field.
The topography model is
derived from framing camera images from Dawn's high-altitude mapping
orbit (420 miles or 680 kilometers above the surface), and the gravity
data come from the low-altitude mapping orbit (130 miles or 210
kilometers above the surface).
Vesta takes approximately 5.34 hours to make a rotation.
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