Astronomy Picture of the Day
December 13, 2013

Fresh Crater, Old Ice (EDM n. 1)
Fresh Crater, Old Ice (EDM n. 1)

Credits: NASA/JPL/University of Arizona - Credits for the additional process. and color.: Dr Paolo C. Fienga/LXTT/IPF

In this Extra Detail Magnification obtained from a picture taken by NASA - Mars Reconnaissance Orbiter on January, 30, 2012, we can better see the Unnamed Impact Crater that, in our opinion, as IPF, is way more than just relatively recent. Look, for instance, at the dark fresh Rays left on the Surface, all around the Impact Feature itself, that the powerful Winds blowing over this Martian Northern Region had no time to erase or, at least, to discolor a little. Furthermore, the Floor of this small Unnamed Crater seems to expose a more than discrete amount of bright Water Ice that, quite obviously, was hiding just (and here, in this specific case, we are talking about a few meters, maybe only - or even less than - 2 or 3) under the Surface.


Remember, just out of curiosity, that the Albedo (---> Reflectivity) of the Water Ice is much higher than the one of the Carbon Dioxide Ice (also known as "Dry Ice" or "CO2 Ice") and, furthermore, consider that the color of a patch of Water Ice tend to appear, to human eyes, really bright and withe, with subtle blue reflections while, in case of a patch of Carbon Dioxide Ice (as well as of a wide Surface covered by a layer of pure CO2 Ice), the color that human eyes can perceive is a kind of pale white/gray, which usually looks opaque, even when it is seen in broad daylight.


Mars Local Time: 14:47 (Early Afternoon)
Coord. (centered): 43,884° North Lat. and 204,346° East Long.
Spacecraft altitude: 303,5 Km (such as about 188,473 miles)
Original image scale range: 30,4 cm/pixel (with 1 x 1 binningso objects ~ 91 cm across are resolved
Map projected scale: 25 cm/pixel
Map projection: EQUIRECTANGULAR
Emission Angle: 7,6°
Phase Angle: 48,0°
Solar Incidence Angle: 40° (meaning that the Sun was about 50° above the Local Horizon at the time the picture was taken)
Solar Longitude: 64,1° (Northern Spring - Southern Fall)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer Italia


This picture (which is a crop taken from a NASA - Original Mars Reconnaissance Orbiter b/w and NON-Map Projected frame identified by the serial n. ESP_025840_2240) has been additionally processed, magnified, contrast enhanced, Gamma corrected, and then colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Mars Reconnaissance Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.



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