File:Iapetus by Saturnlight.jpg

Iapetus_by_Saturnlight.jpg (400 × 400像素,文件大小:35 KB,MIME类型:image/jpeg


摘要

PIA06146
Target Name: Iapetus
Is a satellite of: Saturn
Mission: Cassini Orbiter
Spacecraft: Cassini Orbiter
Instrument: Imaging Science Subsystem - Narrow Angle
Product Size: 400 samples x 400 lines
Produced By: CICLOPS/Space Science Institute
Primary Data Set: Cassini
Full-Res TIFF: PIA06146.tif (156.9 KB)
Full-Res JPEG: PIA06146.jpg (22.82 KB)

Seeing in the Dark
New details on Iapetus are illuminated by reflected light from Saturn in this revealing Cassini image. Never-before-seen features on the Saturn-facing part of Iapetus' bright trailing hemisphere are visible for the first time, including many dark spots, and a sharper view of a dark, circular structure that was first seen at very low resolution by NASA's Voyager 1 in 1980. Iapetus diameter is 1,436 kilometers (892 miles).

The image shows mainly the night side of Iapetus; part of the far brighter sunlit side appears at the right and is overexposed due to the long integration time of 180 seconds. Despite this long exposure time, almost no blurring due to the spacecraft's motion is apparent. This technique for imaging the night side of Iapetus will be used again during a flyby on Jan. 1, 2005, when Cassini will pass 13 times closer to the icy moon.

The image was taken in visible light with the Cassini spacecraft narrow angle camera on Oct. 22, 2004, at a distance of 1.6 million kilometers (994,000 miles) from Iapetus, and from a Sun-Iapetus-spacecraft, or phase, angle of 161 degrees. The view is centered on 0.4 degrees north latitude, 317 degrees west longitude on Iapetus. The image scale is 9.4 kilometers (5.8 miles) per pixel.

The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini-Huygens mission for NASA's Office of Space Science, Washington, D.C. The Cassini orbiter and its two onboard cameras, were designed, developed and assembled at JPL. The imaging team is based at the Space Science Institute, Boulder, Colo.


Source: http://photojournal.jpl.nasa.gov/catalog/PIA06146 (direct link)

本图像或视频收录于美国国家航空航天局 (NASA)喷气推进实验室(Jet Propulsion Laboratory),其照片编号是: PIA06146

此标签不表示文件的著作权状态。任何文件在附有此标签的同時还需要一个有效的著作权标签请参阅许可协议说明页面以了解更多信息。
其他语言:

许可协议

Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
警告:

说明

添加一行文字以描述该文件所表现的内容

此文件中描述的项目

描繪內容

文件历史

点击某个日期/时间查看对应时刻的文件。

日期/时间缩⁠略⁠图大小用户备注
当前2015年12月19日 (六) 03:042015年12月19日 (六) 03:04版本的缩略图400 × 400(35 KB)PlanetUserconverted from TIFF
2005年4月4日 (一) 18:202005年4月4日 (一) 18:20版本的缩略图400 × 400(22 KB)Smartech~commonswikiIapetus, a moon of Saturn, with its dark side illuminated by reflected light from Saturn {{PD-USGov-NASA}} '''Original caption released with image:''' New details on Iapetus are illuminated by reflected light fro

以下2个页面使用本文件:

全域文件用途

以下其他wiki使用此文件:

元数据