File:Helene 2011 PIA12758.jpg
Helene_2011_PIA12758.jpg (464 × 464 pixels, file size: 10 KB, MIME type: image/jpeg)
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Summary
| Description |
Original Caption Released with Image: The Cassini spacecraft imaged the surface of Saturn's moon Helene as the spacecraft flew by the moon on Jan. 31, 2011. This small moon leads Dione by 60 degrees in the moons' shared orbit. Helene is a "Trojan" moon of Dione, named for the Trojan asteroids that orbit 60 degrees ahead of and behind Jupiter as it circles the Sun. See PIA12723 for an earlier, closer view. This view looks toward the trailing hemisphere of Helene (33 kilometers, or 21 miles across). North on Helene is up and rotated 2 degrees to the left. The image was taken with the Cassini spacecraft narrow-angle camera using a combination of spectral filters sensitive to wavelengths of polarized green light centered at 617 and 568 nanometers. The view was obtained at a distance of approximately 31,000 kilometers (19,000 miles) from Helene and at a Sun-Helene-spacecraft, or phase, angle of 65 degrees. Scale in the original image was 187 meters (613 feet) per pixel. The image was contrast enhanced and magnified by a factor of 1.5 to enhance the visibility of surface features. |
| Source | NASA/JPL/Space Science Institute |
| Author | NASA/JPL/Space Science Institute |
Licensing
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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Warnings:
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Original upload log
Transferred from en.wikipedia to Commons using For the Common Good.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 21:23, 21 March 2011 | 464 × 464 (9,857 bytes) | w:en:Kwamikagami (talk | contribs) | {{Information |Description = Original Caption Released with Image: The Cassini spacecraft imaged the surface of Saturn's moon Helene as the spacecraft flew by the moon on Jan. 31, 2011. This small moon leads Dione by 60 degrees in the moons' shared |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:54, 19 October 2016 | | 464 × 464 (10 KB) | XXN | Transferred from en.wikipedia: see original upload log above |
