The 60th moon of Saturn reveals itself in a sequence of images. The
discovery suggests that the new moon, along with its neighbors Methone and
Pallene (discovered by the Cassini imaging team in 2004), may form part of
a larger group of moons in this region. The movie spans six hours.
Initial calculations show the moon to have a width of approximately 2
kilometers (1.2 miles), with an orbit that lies between those of the moons
Methone and Pallene. The moon's orbit is in resonance with another moon,
Mimas, also seen in this sequence as a very bright, moving object. The new
moon's location is indicated by a red box.
The (narrow) ring visible in the images is the G ring, and the G ring arc
passes through the field of view during the course of the movie. Calypso,
a Trojan moon of Tethys, is also visible in the sequence. Trojan moons are
found near gravitationally stable points ahead or behind a larger moon.
This view looks toward the non-illuminated side of the rings from about 3
degrees above the ringplane.
The series of images was taken in visible light with the Cassini
spacecraft wide-angle camera on May 30, 2007, at a distance of
approximately 1.76 million kilometers (1.09 million miles) from Saturn.
Image scale is about 105 kilometers (65 miles) per pixel. The ghostly
shape that stretches across the scene results from scattered light within
the camera optics.
The Cassini-Huygens mission is a cooperative project of NASA, 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, D.C. 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, Colo.
For more information about the Cassini-Huygens mission visit
http://saturn.jpl.nasa.gov/home/index.cfm. The Cassini imaging team
homepage is at http://ciclops.org.
