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Post Info TOPIC: Helene
Blobrana


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Helene and Mimas
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Helene and Mimas, the two moons of Saturn were imaged by the Cassini spacecraft on Feb. 3, 2007.
Mimas (397 kilometres across) is seen here just before gliding in front of Helene (32 kilometres across), which lays 192,000 kilometres in the distance beyond the larger moon.
The limb of Mimas is flattened in the west, where the rim if the large crater Herschel lies.

HeleneMimas4
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Credit: NASA/JPL/Space Science Institute

This view looks toward the lit side of the rings from about 3 degrees below the ringplane.
The image was taken in visible light with the Cassini spacecraft narrow-angle camera at a distance of approximately 1.3 million kilometres from Mimas and 1.5 million kilometres from Helene. Image scale is 8 kilometres per pixel on Mimas and 9 kilometres per pixel on Helene.

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Blobrana


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RE: Helene
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This set of images exposes details on Helene. Large portions of this Trojan moon of Dione appear to have been blasted away by impacts.


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Credit NASA

Cassini passed within 50,000 kilometres of Helene (32 kilometres across) on Aug. 17, 2006, when these images were acquired. The views were obtained over the course of an hour, and are presented here in reverse order (i.e., the leftmost image was taken latest).
The images were taken in visible light with the Cassini spacecraft narrow-angle camera. As presented here, the views were acquired at distances ranging from 62,000 to 51,000 kilometres from Helene and at a Sun-Helene-spacecraft, or phase, angle of 111 to 120 degrees. Image scale is 375 to 300 meters per pixel, from left to right.

-- Edited by Blobrana at 20:03, 2006-09-15

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Blobrana


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This image of Helene was taken on August 17, 2006 by the Cassini spaceprobe when it was approximately 50,587 kilometres away.

N00064780
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The image was taken using the CL1 and CL2 filters.

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Blobrana


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HeleneI3

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Blobrana


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Saturn's moons Helene and Polydeuces are Trojan moons of Dione, orbiting about 60 degrees ahead of and behind, the much larger moon.
Trojan moons are found near gravitationally stable points ahead or behind a larger moon.
Polydeuces (S/2004 S5) was discovered by the Cassini imaging team.
Helene is 32 kilometres across, while Dione is 1,118 kilometres across.
Tethys also has two of its own Trojan moons.


This image was taken in visible light with the Cassini spacecraft narrow-angle camera on May 20, 2005, at a distance of approximately 760,000 kilometres from Helene. The image scale is 5 kilometres per pixel.
This view of Helene has been magnified by a factor of three and sharpened to aid visibility.


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