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Small, Yet Striking
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Small, Yet Striking
Release Date: July 26, 2011
Topics: Crater Rays, Han Kan, , , Xiao Zhao

Date acquired: July 11, 2011
Image Mission Elapsed Time (MET): 218840609
Image ID: 489105
Instrument: Wide Angle Camera (WAC) of the Mercury Dual Imaging System (MDIS)
WAC filter: 9 (996 nanometers)
Center Latitude: 14.17°
Center Longitude: 122.3° E
Resolution: 456 meters/pixel
Scale: Diameter of Xiao Zhao is 24.2 kilometers (15.0 miles)
Incidence Angle: 22.1°
Emission Angle: 34.3°
Phase Angle: 56.4°

Of Interest: Xiao Zhao, a relatively small fresh crater, stretches its rays across this entire image, illustrating that small impacts are still quite powerful. The bright crater rays, composed of fresh material excavated by the impact, are contrasted by the older, darker surrounding surface. Another small impact crater well known for its extensive rays is Han Kan.

This image was acquired as a high-resolution targeted observation. Targeted observations are images of a small area on Mercury's surface at resolutions much higher than the 250-meter/pixel (820 feet/pixel) morphology base map or the 1-kilometer/pixel (0.6 miles/pixel) color base map. It is not possible to cover all of Mercury's surface at this high resolution during MESSENGER's one-year mission, but several areas of high scientific interest are generally imaged in this mode each week.

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.

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington

For information regarding the use of MESSENGER images, see the image use policy.


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