Japetus: a clear view in the darkness

Non è certo un frame di qualità eccezionale, ma - finalmente! - si torna a vedere Giapeto, la "Luna Bifronte" (ossìa per metà chiara e luminosa e per metà nera come la pece).
Questo il commento NASA originale:"This view shows one of the huge impact basins on the terminator of Saturn's moon Iapetus and a smaller, but still fairly large, crater near the southern bright-dark boundary. Just visible near the western limb, in the dark territory of Cassini Regio, is the moon's mysterious equatorial ridge. The ridge was discovered in Cassini images and reaches 20 Km (approx. 12 miles) high in places. This view shows principally the leading hemisphere on Iapetus. North is up and tilted 15 degrees to the right. The image was taken with the Cassini spacecraft narrow-angle camera on March 19, 2005, through spectral filters sensitive to wavelengths of infrared light centered at 752 nnmts. The view was acquired at a distance of approximately 1,4 MKM from Iapetus and at a phase angle of 70°. Resolution is 8 Km/pixel".