Astronomy Picture of the Day
March 25, 2012

Cliffs and Ponds on the Rim of Eminescu Crater
Cliffs and Ponds on the Rim of Eminescu Crater

Credits: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington and Dr Paolo C. Fienga for the additional process. and color.

This oblique view obtained by the Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS) located onboard the NASA - MESSENGER Spacecraft, shows a portion of the Rim of the Mercurian Crater Eminescu. The angle of this image provides a great perspective for viewing not only the spectacular Cliffs that formed as a quantity of unstable material slumped from the Crater Rim down into the Crater Interior, but also a number of Ponds (such as lake-like Surface Features) of Impact Melt perched on the Rim itself. Also the shadows, typical of such a kind of pictures, are something highly spectacular and deeply suggestive.
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-Km/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.

Date of image acquisition: December, 05th, 2011
Image Mission Elapsed Time (MET): 231611014
Image ID: 1099316
Instrument: Narrow Angle Camera (NAC) of the Mercury Dual Imaging System (MDIS)
Center Latitude: 9,8° North
Center Longitude: 115,5° East
Resolution: 34 meters/pixel
Scale: the scene is approximately 35 km (about 22 miles)
Solar Incidence Angle: 65,1° (meaning that the Sun was about 24,9° above the Local Horizon when the picture was taken)
Emission Angle: 60,1°
Sun-Mercury-MESSENGER
(or "Phase") Angle: 125,3°

 


This frame has been colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - MESSENGER Spacecraft and then looked down, towards the Surface of Mercury), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.


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