File:Helene 2011 PIA12758.jpg

No higher resolution available.

Helene_2011_PIA12758.jpg ‎(464 × 464 pixels, file size: 10 KB, MIME type: image/jpeg)

This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.

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

	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.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

Original upload log

Transferred from en.wikipedia to Commons using For the Common Good.

The original description page was here. All following user names refer to en.wikipedia.

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

Click on a date/time to view the file as it appeared at that time.

	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

File usage

No pages on the English Wikipedia use this file (pages on other projects are not listed).