美国国家航空航天局NASA每日一图-2017年8月7日(普罗米修斯和幽灵F光环)

 

Prometheus and the Ghostly F Ring

The thin sliver of Saturn's moon Prometheus lurks near ghostly structures in Saturn's narrow F ring in this view from NASA's Cassini spacecraft. Many of the narrow ring's faint and wispy features result from its gravitational interactions with Prometheus (86 kilometers, or 53 miles across).

Most of the small moon's surface is in darkness due to the viewing geometry here. Cassini was positioned behind Saturn and Prometheus with respect to the sun, looking toward the moon's dark side and just a bit of the moon’s sunlit northern hemisphere.

Also visible here is a distinct difference in brightness between the outermost section of Saturn's A ring (left of center) and rest of the ring, interior to the Keeler Gap (lower left).

This view looks toward the sunlit side of the rings from about 13 degrees above the ring plane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 13, 2017.

The view was acquired at a distance of approximately 680,000 miles (1.1 million kilometers) from Saturn. Image scale is 4 miles (6 kilometers) per pixel.

The Cassini mission is a cooperative project of NASA, ESA (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 mission for NASA's Science Mission Directorate, Washington. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colorado.

For more information about the Cassini-Huygens mission visit https://saturn.jpl.nasa.gov and http://www.nasa.gov/cassini . The Cassini imaging team homepage is at http://ciclops.org .

Credit: NASA/JPL-Caltech/Space Science Institute

Last Updated: Aug. 7, 2017
Editor: Tony Greicius

普罗米修斯和幽灵F光环

土星的月球普罗米修斯的薄条子在NASA的卡西尼航天飞机的这个视野中潜伏在土星狭窄的F环的鬼屋结构附近。许多狭窄的环的微弱和微弱的特征是由于与普罗米修斯的引力相互作用(86公里,或53英里)。

由于这里的观察几何,大部分小月亮的表面都在黑暗中。卡西尼位于土星和普罗米修斯之后,相对于太阳,朝向月球的黑暗面,只有一点月亮的阳光照射的北半球。

在这里也可以看到,在土星A环(中心左侧)的最外面部分与Keeler Gap(左下方)内部的环的其余部分之间的明显差异。

这个视图从环平面上方约13度看向环的阳光照射面。2017年5月13日,卡西尼航天器窄角相机在可见光下拍摄图像。

该景观距离土星约68万英里(110万公里)。图像尺度为每像素4英里(6公里)。

卡西尼任务是美国宇航局,欧空局(欧空局)和意大利航天局的合作项目。喷气推进实验室,加利福尼亚理工学院在帕萨迪纳的一个部门负责管理美国宇航局科学任务总局华盛顿的任务。卡西尼轨道器及其两个车载摄像机在JPL设计,开发和组装。成像操作中心位于科罗拉多州博尔德的空间科学研究所。

有关Cassini-Huygens任务的更多信息,请访问https://saturn.jpl.nasa.gov  和  http://www.nasa.gov/cassini。卡西尼影像小组主页是  http://ciclops.org。

信用: NASA / JPL-Caltech /空间科学研究所

最后更新:2017年8月7日
编者:Tony Greicius

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