Titan and Dione (Natural Colors; credits: NASA/JPL-Caltech/Space Science Institute)

Caption NASA:"Saturn's largest moon, Titan, appears deceptively small paired here with Dione, Saturn's third-largest moon, in this view from NASA's Cassini Spacecraft. Titan (which is approx. 3200 miles or about 5150 Km across) is much farther from the Spacecraft than Dione (that, on its side, is approx. 698 miles or about 1123 KM across) is in this view. The view was captured at a distance of approx. 684.000 miles (such as about 1,1 MKM) from Titan but only about 85.000 miles (such as approx. 136.000 Km) from Dione.
Titan appears in its True Colors, but it has been brightened by a factor of about 1,6 relative to Dione. This view looks toward the Saturn-facing side of Titan and the area between the Saturn-facing side and Leading Hemisphere of Dione. North is up on both moons.

Images taken using red, green and blue spectral filters were combined to create this Natural Color view. The images were obtained with the Cassini Spacecraft wide-angle camera on Nov. 6, 2011. Scale in the original image was roughly 5 miles (such as approx. 8 Km) per pixel on Dione and roughly 41 miles (about 66 Km) per pixel on Titan. The image has been magnified by a factor of 1,5 and contrast-enhanced to aid visibility".