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Matryoshka Dolls
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Caption:
The largest crater in this image is superimposed by three different craters that each have central peaks. The largest of these superimposed craters is overlapped by one of the others, creating a small crater partially inside another which in turn has another smaller crater partially inside it. Much of Mercury's surface is heavily cratered so overlapping craters can be seen in many places, including the areas around Camoes crater seen here .
This image was acquired as part of MDIS's high-resolution surface morphology base map. The surface morphology base map will cover more than 90% of Mercury's surface with an average resolution of 250 meters/pixel (0.16 miles/pixel or 820 feet/pixel). Images acquired for the surface morphology base map typically have off-vertical Sun angles (i.e., high incidence angles) and visible shadows so as to reveal clearly the topographic form of geologic features.
Date acquired:
July 13, 2011
Image Mission Elapsed Time (MET):
219038585
Image ID:
499240
Instrument:
Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude:
-53.88°
Center Longitude:
83.80° E
Resolution:
361 meters/pixel
Scale:
The largest crater in this image is approximately 105 km (65.24 mi) wide
Incidence Angle:
67.1°
Emission Angle:
2.0°
Phase Angle:
68.9°
Background Info:
The MESSENGER spacecraft is the first ever to orbit the planet Mercury, and the spacecraft's seven scientific instruments and radio science investigation are unraveling the history and evolution of the Solar System's innermost planet. Visit the Why Mercury? section of this website to learn more about the key science questions that the MESSENGER mission is addressing. During the one-year primary mission, MDIS is scheduled to acquire more than 75,000 images in support of MESSENGER's science goals.
These images are from MESSENGER, a NASA Discovery mission to conduct the first orbital study of the innermost planet, Mercury. For information regarding the use of images, see the MESSENGER image use policy .
Cataloging Keywords:
| Name | Value | Additional Values |
|---|---|---|
| Target | Mercury | |
| System | ||
| Target Type | Planet | |
| Mission | MESSENGER | |
| Instrument Host | MESSENGER | |
| Host Type | Orbiter | |
| Instrument | Mercury Dual Imaging System (MDIS) | |
| Detector | Narrow Angle Camera (NAC) | |
| Extra Keywords | Crater, Grayscale, Map, Radio, Shadow | |
| Acquisition Date | ||
| Release Date | 2011-08-02 | |
| Date in Caption | 2011-07-13 | |
| Image Credit | NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington | |
| Source | photojournal.jpl.nasa.gov/catalog/PIA14512 | |
| Identifier | PIA14512 | |
