File:PIA07712 - F ring animation.gif

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PIA07712_-_F_ring_animation.gif （450 × 450像素，文件大小：3.43 MB，MIME类型：image/gif、循环、65帧、26秒）

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摘要

描述PIA07712 - F ring animation.gif	This movie sequence from Cassini shows dark drapes in the inner strands of the F ring caused by the gravitational influence of the shepherd moon Prometheus (102 kilometers, 63 miles across). Prometheus appears first in the sequence, interior to the F ring, and Pandora (84 kilometers, 52 miles across) follows along outside of the ring. Radial structure in the bright core of the ring is visible throughout the movie. Prometheus orbits closer to Saturn, and thus faster, than the icy particles that make up the F ring. The moon passes comes closest to the ring at “apoapse”, when it is farthest from Saturn. It is during these apoapse passages that Prometheus has its greatest influence on the fine ring material. With time, the ring material previously affected falls behind so that on the next apoapse passage of Prometheus, a new gore in the inner ring material is made. The material closer to Prometheus orbits the planet faster than the material closer to the bright F ring core. The gores, together with the sheared-out material due to differential orbital motion, create the dark, diagonal drapes. Several background stars are seen moving across the field during the movie. The visible light images in this sequence were acquired using the narrow angle camera on April 13, 2005 from a distance of approximately 1.2 million kilometers (700,000 miles) from Saturn. 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 Science Mission Directorate, Washington, D.C. The imaging team consists of scientists from the US, England, France, and Germany. The imaging operations center and team lead (Dr. C. Porco) are based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission, visit http://saturn.jpl.nasa.gov and the Cassini imaging team home page, http://ciclops.org. This is a truncation of NASA's half-size animated gif version of the sequence. The full size image sequence is also available at http://photojournal.jpl.nasa.gov/animation/PIA07712.
日期	2005年4月13日
来源	http://ciclops.org/view.php?id=1361
作者	NASA/JPL/Space Science Institute
其他版本	Low quality OGG Theora video at one frame per second Low quality OGG Theora video at 2.5 frames per second Low quality OGG Theora video at 5 frames per second Medium quality OGG Theora video at 5 frames per second Full quality OGG Theora video at 2.5 frames per second Full quality OGG Theora video at 25 frames per second

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： PIA07712

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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	大小	用户	备注
当前	2007年11月24日 (六) 19:51	450 × 450（3.43 MB）	WolfmanSF	Reduce file size by deleting alternate frames. Double delay setting to maintain speed of animation.
	2007年11月23日 (五) 09:48	450 × 450（6.44 MB）	WolfmanSF	truncate down to 122 frames
	2007年11月23日 (五) 02:00	450 × 450（6.91 MB）	WolfmanSF	further truncation down to 131 frames
	2007年11月22日 (四) 09:02	450 × 450（7.12 MB）	WolfmanSF
	2007年11月21日 (三) 10:01	450 × 450（9.01 MB）	WolfmanSF	{{Information \|Description=This movie sequence from Cassini shows dark drapes in the inner strands of the F ring caused by the gravitational influence of the shepherd moon Prometheus (102 kilometers, 63 miles across). Prometheus appears first in the sequ