画像:Janus against Saturn PIA08296.jpg
出典: フリー百科事典『ウィキペディア（Wikipedia）』
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| このファイルはウィキメディア・コモンズから呼び出されたものです。 ページ・ノートへの記入や履歴などの詳細の確認はコモンズの画像説明ページ（ノート/履歴/ログ）を使用してください。 |
ウィキメディア・コモンズの記述
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| Description |
The Cassini spacecraft provides this dramatic portrait of Janus against the cloud-streaked backdrop of Saturn. Like many small bodies in the solar system, Janus (181 kilometers, or 113 miles across) is potato-shaped with many craters, and the moon has a surface that looks as though it has been smoothed by some process. Like Pandora (see PIA07632) and Telesto (see PIA07696), Janus may be covered with a mantle of fine dust-sized, icy material. The image was taken using a spectral filter sensitive to wavelengths of infrared light centered at 930 nanometers. The view was acquired with the Cassini spacecraft narrow-angle camera on Sept. 25, 2006 at a distance of approximately 145,000 kilometers (90,000 miles) from Janus and at a Sun-Janus-spacecraft, or phase, angle of 62 degrees. North on Saturn is up. Image scale is 871 meters (2,858 feet) per pixel. |
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| Source | |
| Date |
Sept. 25, 2006 |
| Author |
NASA/JPL/Space Science Institute |
| Permission |
PD |
[edit] Licensing
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This file is in the public domain because it was created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (NASA copyright policy page or JPL Image Use Policy).
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