Astronomy Picture of the Day
July 4, 2013

Closing-up on Janus
Closing-up on Janus

Credits: NASA/JPL/Space Science Institute - Credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/IPF

Dark and deep Shadows were obscuring most part of Janus' cratered Surface, when the NASA - Cassini Spacecraft took a close look at this Saturnian moon during the Fly-By which occurred on March 27, 2012.

This view is centered on Terrain located at approx. at 13° South Latitude and 26° West Longitude. The image was taken in Visible Light with the NASA - Cassini Spacecraft Narrow-Angle Camera, at a distance of approximately 28.000 miles (such as about 45.061 Km) from Janus and at a Sun-Janus-Cassini Spacecraft , or Phase, Angle of 109°. Image scale is 892 feet (272 meters) per pixel.

This frame (which is an Original NASA - Cassini Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 14607) has been additionally processed, contrast enhanced, magnified and then colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Cassini Spacecraft and then looked outside, towards the Saturnian moon Janus), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. Different colors, as well as different shades of the same color, mean, among others, the existence of different Elements present on the Surface of Janus, each having a different Albedo (---> Reflectivity) and Chemical Composition.

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