| Risultati della ricerca nelle immagini - "Tethys," |
Enceladus&C-PIA08216.jpgJewels...58 visiteThe real jewels of Saturn are arguably its stunning collection of icy moons. Seen here with the unlit side of the Rings are Titan (Dx), Tethys (Sx) and Enceladus (Cn) with its fountain-like geysers.
The faint, vertical banding in the image is due to "noise" in the spacecraft electronics. This noise is difficult to remove from an image that has a very wide dynamic range - i.e.: a wide range of brightness levels - as in the difference between gleaming Titan and the faint plumes of Enceladus.
Additionally, a reflection of Titan's light within the camera optics is likely responsible for the faint secondary image of Titan's limb to the left of the giant moon.
The image was taken in visible green light with the Cassini spacecraft narrow-angle camera on June 10, 2006 at a distance of approx. 3,9 MKM (about 2,4 MMs) from Enceladus; 5,3 MKM (about 3,3 MMs) from Titan and 4,4 MKM (such as approx. 2,7 MMs) from Tethys.
The phase angle is 160° on Enceladus.
Image scale is 23 kilometers (14 miles) per pixel on Enceladus, 32 kilometers (20 miles) per pixel on Titan and 26 kilometers (16 miles) per pixel on Tethys.
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Tethys&Co-PIA08165.jpgWonderful Trio, in Saturn's Space55 visiteCaption originale:"The three very different moons seen here provide targets of great interest for planetary scientists studying the Saturn System. Captured here by Cassini, along with the Rings, are Tethys at upper right, Enceladus below center and Janus at lower left.
Researchers study the orbital dance of Janus (181 Km, or about 113 miles across) with Epimetheus, tectonics and cratering on Tethys (1.071 Km, or approx. 665 miles across) and geyser activity on Enceladus (505 Km, or about 314 miles across). And these are only a few of the wonders that await exploration in the realm of the Ringed Planet.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera on March 16, 2006, at a distance of approx. 2,4 MKM (such as about 1,5 MMs) from Tethys; 1,9 MKM (about 1,2 MMs) from Enceladus and 2,2 MKM (roughly 1,4 MMs) from Janus. The image scale is about 14 Km (appx. 9 miles) per pixel on Tethys, 11 Km (about 7 miles) p. px. on Enceladus and 13 Km (about 8 miles) p. px on Janus".
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