* Astronomy

This image shows Polydeuces, a moon that was discovered by the Cassini spacecraft.
It is only 3 kilometres across. Polydeuces is co-orbital (orbits Saturn at the same distance) with Helene (32 kilometres across), and Dione (1,126 kilometres across).



Because the moon was only recently discovered and is so small, scientists presently know very little about it. Further observations by Cassini may yield additional insights about its nature and composition.
The image was taken with the Cassini spacecraft narrow-angle camera on May 22, 2006 at a distance of approximately 73,000 kilometres from Polydeuces and at a Sun-Polydeuces-spacecraft, or phase, angle of 41 degrees. The image was obtained using a spectral filter sensitive to wavelengths of infrared light centred at 752 nanometers. Scale in the original image was 434 meters per pixel.
The image was magnified by a factor of four and contrast-enhanced to aid visibility.