This view, captured by the Wide Angle Camera (WAC), shows a trail of small craters. Such secondary crater chains are formed when the ejecta from a primary impact fall in the surrounding area, forming their own often overlapping small craters. Also visible in this image are smooth plains, formed by volcanism that has filled in a large impact crater.
Date acquired: July 15, 2011
Image Mission Elapsed Time (MET): 219181924
Image ID: 505807
Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS)
WAC filter: 7 (748 nanometers)
Center Latitude: 83.21°
Center Longitude: 173.6° E
Resolution: 155 meters/pixel
Scale: The small crater at the bottom of the image has a diameter of 24 km (15 miles).
Incidence Angle: 85.3°
Emission Angle: 0.2°
Phase Angle: 85.3°
Photo credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Posts
No comments:
Post a Comment