Astronomy Picture of the Day
December 27, 2012

The question remains:  Seasonal or Permanent?
The question remains: Seasonal or Permanent?

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

In this frame, taken by the NASA - Cassini Spacecraft, we can look, once again, at Titan's South Polar Vortex, from almost below the moon (for a similar view, please refer to the APOD of November, 14, 2012). Imaging scientists are still monitoring this Vortex in order to get a better understanding of its seasonal developments but, so far, no major changing (actually, no changing at all) has been noticed.

This view looks toward the anti-Saturn Hemisphere of Titan; North is up and rotated 36° to the left. The image was taken with the NASA - Cassini Spacecraft Narrow-Angle Camera on September, 13, 2012 using a Spectral Filter sensitive to Wavelengths of Near-InfraRed Light centered at 889 nanometers. The view was obtained at a distance of approximately 1 Million Miles (such as approx. 1,6 Million KiloMeters) from Titan and at a Sun-Titan-CASSINI Spacecraft, or Phase, Angle of 73°. Image scale is roughly 6 miles (such as approx. 9,65 Km) per pixel.

This picture (which is an Original NASA - Cassini Spacecraft b/w frame published on the NASA - Planetary Photojournal with the ID n. PIA 14639) has been additionally processed and then colorized, according to an informed speculation carried out by Dr Paolo C. Fienga (LXTT-IPF), 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 Titan), 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 in the Atmosphere of Titan, each having a different Albedo (---> Reflectivity) and Chemical Composition.

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