Posts Tagged ‘framing camera’


 

25 Feb
2014

Virtual Tour of Vesta

by Thomas Roatsch
 

The International Astronomical Union recently approved a new set of feature names for giant asteroid Vesta: Albia, Africana and Alypia Craters, to name a few. Among the features are dorsa (ridges), fossae (long, narrow shallow depressions), a rupes (scarp or cliff), and craters from Vesta’s mysterious north polar region. This compels us to take another close look at Vesta’s marvelous atlas.

An atlas of the asteroid Vesta, created from images taken during the Dawn mission’s low altitude mapping orbit (LAMO), is accessible for the public to explore online.  The set of maps was created from mosaics of 10,000 images from Dawn’s framing camera (FC) instrument, taken at an altitude of about 210 kilometers.  The maps are mostly at a scale of 1:200 0000 (1 centimeter = 2 kilometers), about that of regional road maps.

 Vesta's Low Altitude Mapping Orbit (LAMO) Atlas is at the scale of regional road maps: 1cm = 2 km (1 in = 3 mi).

Vesta’s Low Altitude Mapping Orbit (LAMO) Atlas is at the scale of regional road maps: 1 cm = 2 km (1 in = 3 mi)
Credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA

Creating the atlas was a painstaking task – each map sheet of this series used roughly 400 images. The atlas shows how extreme the terrain is on a body the size of Vesta.  In the south pole projection alone, the Severina crater contours reach a depth of 18 kilometers; just over a hundred kilometers away the mountain peak towers 7 kilometers above the ellipsoid reference level.

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1 Jan
2014

Six of Dawn’s Top 2013

by Chris Russell
 

From our Principal Investigator, Chris Russell

As 2013 drew to a close, we asked the Dawn team to choose their top stories or news from the Dawn mission in 2013 and received some compelling responses. Over the next several weeks, more top choices will be coming your way. We are beginning with principal investigator Chris Russell’s perspective.

It is often hard to ascribe dates to projects that extend across year boundaries, but here are six great contributions from Dawn in 2013.

colorized image of Aelia crater

Assigning colors to different wavelengths of light revealed not only geological structures invisible to the naked eye, but landscapes of incomparable beauty. Image: NASA/JPL-Caltech/UCLAMPS/DLR/IDA

1. Dawn Objectives at Ceres
Plans were developed allowing Dawn to achieve all its level 1 objectives within its technical resources at Ceres and NASA agreed with these plans.
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2. Color Illuminates Vesta
Another important achievement in 2013 was the improvement in the color images from Dawn. The framing camera team assigned colors to different wavelengths of light and, in the process, revealed in unprecedented detail not only geological structures that are invisible to the naked eye, but also landscapes of incomparable beauty. Researchers at Max Planck led by Andreas Nathues can now see structures such as melts from impacts, craters buried by quakes and foreign material brought by space rocks.

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