Astronomy Picture of the Day
March 17, 2016

Features of Terra Sirenum (Part I)
Features of Terra Sirenum (Part I)

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

In this beautiful VIS image, taken by the NASA - Mars Odyssey Orbiter on November, 11th, 2009, and during its 35.086th orbit around the Red Planet, we can see a small portion of the Martian Region known as Terra SirenumTerra Sirenum is a large Region located in the Southern Hemisphere of Mars.

It is centered at about 39°42' South Latitude and 150°00' West Longitude and it covers (roughly) 3900 Km (such as about 2421,9 miles) at its broadest extent. Terra Sirenum is - mostly - an Upland Area notable for massive cratering, including the large Newton Crater.

Terra Sirenum is found in between the Phaethontis Quadrangle and the Memnonia Quadrangle of Mars. However, a (relatively small) Low Area of Terra Sirenum is believed to have once held a Lake that, eventually, drained through Ma'adim Vallis.

Latitude (centered): 36,2708° South
Longitude (centered): 223,7260° East
Instrument: VIS

This image (which is an Original Mars Odyssey Orbiter falsely colored and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 20426) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced and sharpened, Gamma corrected and then re-colorized in Absolute Natural Colors (such as the colors that a normal human eye would actually perceive if someone were onboard the NASA - Mars Odyssey 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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