Astronomy Picture of the Day
September 17, 2012

Features of the Wall of Coprates Chsma
Features of the Wall of Coprates Chsma

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

Today's APOD is a NASA - Mars Reconnaissance Orbiter frame showing a small portion of the Wall of Coprates Chasma, an approx. 966 Km long Canyon, located in the Coprates Quadrangle of Mars, at about 13,4° South Latitude and 61,4° West Longitude. Quite a few clear evidences of the verification of Dustslides can be seen all over the Wall (look at the darker, vertical and almost parallel lines starting from the Edge of the Canyon and then going all the way down until its Floor), while obvious signs of accumulation of fallen Rocky Debris are well visible, jointly with Rocky Outcrops and a series of Dust and Sand Ripples, on the Floor of Coprates, in close proximities with the Wall. The central portion of the Floor of Coprates Chasma, on the other hand, seems (relatively) flat and free of Rocks and Ripples.

Mars Local Time: 14:08 (early afternoon)
Coord. (centered): 15,599° South Lat. and 300,540° East Long.
Spacecraft altitude: 258,8 Km (such as about 161,7 miles)
Original image scale range: 51,8 cm/pixel (with 2 x 2 binning) so objects ~ 1 mt and 55 cm across are resolved
Map projected scale: 50 cm/pixel
Emission Angle: 6,9°
Sun-Mars-Spacecraft (or Phase) Angle: 37,9°
Solar Incidence Angle: 31° (meaning that the Sun was about 59° above the Local Horizon at the time the picture was taken)
Solar Longitude: 320,3° (Northern Winter - Southern Summer)
Credits: NASA/JPL/University of Arizona
Additional process. and coloring: Lunar Explorer Italia

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 - 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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