Astronomy Picture of the Day
January 8, 2014

Unnamed Half-Impact Crater in Beta Regio
Unnamed Half-Impact Crater in Beta Regio

Credits: NASA/JPL - Magellan Project - Credits for the additional process. and color.: Dr Paolo C. Fienga/LXTT/IPF

This NASA - Magellan Spoacecraft's Radar-Image shows us an unusually-looking "Half Impact Crater", which lies in the Rift (---> huge Crack) between Rhea and Theia Montes, both located in the Beta Regio on Venus. The Unnamed Impact Crater that we see in today's APOD is roughly 37 Km (such as a little less tha 23 miles) in diameter and is found at 29,9° North Latitude and 282,9° East Longitude.

This Crater has been litterally cut by many Fractures and the reason of that could be found in the fact that it was formed by the Impact of a (relatively) large Celestial Object. The Eastern Half (Dx) of the Crater was destroyed during the formation of a so-called "Fault Valley" that is up to 20 Km (such as approx. 12,42 miles) wide and apparently quite deep (the actual depth is unknown, so far). However (and, at least, in our opinion, as IPF), the actual reason of the Fractures that we can see here can also be found in the verification of Geologic (Tectonic, maybe?) Events which came a long time after the creation of the Crater

Last, but not least, you may want to notice that a North-to-South profile through the very center of the Crater seems to show that such a feature could well be the final result of the down dropping and removal of most of the Eastern Half of the Crater itself.

This frame (which is an Original NASA - Magellan Spacecraft Radio-Image published on the NASA - Planetary Photojournal with the n. PIA 00100), since it is just a Radio-Image of the Venusian Surface and NOT a real view of it, has been colorized, according to an educated guess carried out by Dr Paolo C. Fienga (LXTT-IPF), in what they could reasonably be its possible Absolute Natural Colors (such as the colors that a human eye would perceive if someone were onboard the NASA - Magellan Spacecraft and, once the thick layer of Venusian Clouds and Fogs is completely overcome, looked down, towards the Surface of Venus itself), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.

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