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Saturn's B ring is the most opaque ring in our solar system, but many of its fundamental parameters, including its total mass, are not well constrained. Spiral density waves generated by mean-motion resonances with Saturn's moons provide…

Earth and Planetary Astrophysics · Physics 2016-08-31 M. M. Hedman , P. D. Nicholson

We report observations of stripe-like features in Enceladus' plumes captured simultaneously by Cassini's VIMS-IR and ISS NAC instruments during flyby E17, with similar patterns seen in VIMS-IR data from flyby E13 and E19. These parallel…

Observations of the November 1995 Sun crossing of the Saturn's ring-plane made with the 3.6m CFH telescope, using the UHAO adaptive optics system, are presented here. We report the detection of four arcs located in the vicinity of the F…

Astrophysics · Physics 2009-10-31 S. Charnoz , A. Brahic , C. Ferrari , I. Grenier , F. Roddier , P. Thebault

Small (~50km scale), irregular features seen in Cassini images to be emanating from Saturn's F ring have been termed mini-jets by Attree et al. (2012). One particular mini-jet was tracked over half an orbital period, revealing its evolution…

Earth and Planetary Astrophysics · Physics 2017-12-21 Nicholas O. Attree , Carl D. Murray , Gareth A. Williams , Nicholas J. Cooper

We predict how a remote observer would see the brightness variations of giant planets similar to Jupiter and Saturn as they orbit their central stars. We model the geometry of Jupiter, Saturn and Saturn's rings for varying orbital and…

Spokes are localized clouds of fine particles that appear over the outer part of Saturn's B ring. Over the course of the Cassini Mission, the Imaging Science Subsystem (ISS) obtained over 20,000 images of the outer B ring, providing the…

Earth and Planetary Astrophysics · Physics 2025-01-22 S. R. Callos , M. M. Hedman , D. P. Hamilton

We report the first unambiguous detection of X-ray emission originating from Saturn with a Chandra observation, duration 65.5 ksec with ACIS-S3. Beyond the pure detection we analyze the spatial distribution of X-rays on the planetary…

Astrophysics · Physics 2009-11-10 J. -U. Ness , J. H. M. M. Schmitt , S. J. Wolk , K. Dennerl , V. Burwitz

The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between 30% and 50%…

The $\mu$ and $\nu$ rings of Uranus form a secondary ring-moon system with the satellites Puck, Mab,Portia, and Rosalind. These rings are tenuous and dominated by micrometric particles, which can be strongly disturbed by the solar radiation…

Earth and Planetary Astrophysics · Physics 2013-07-12 R. Sfair

We use a state-of-the-art physics-based model of electromagnetic scattering to analyze average circular polarization ratios measured for the A and B rings of Saturn at a wavelength of 12.6 cm. This model is directly based on the Maxwell…

Astrophysics · Physics 2011-02-11 Michael I. Mishchenko , Janna M. Dlugach

The nearby A4-type star Fomalhaut hosts a debris belt in the form of an eccentric ring, which is thought to be caused by dynamical influence from a giant planet companion. In 2008, a detection of a point-source inside the inner edge of the…

Earth and Planetary Astrophysics · Physics 2015-06-03 Markus Janson , Joe Carson , David Lafreniere , David Spiegel , John Bent , Palmer Wong

We describe a powerful signal processing method, the continuous wavelet transform, and use it to analyze radial structure in Cassini ISS images of Saturn's rings. Wavelet analysis locally separates signal components in frequency space,…

The Iapetus -1:0 nodal bending wave, the first spiral wave ever described in Saturn's rings, has been seen again for the first time in 29 years. We demonstrate that it is in fact the nodal bending wave, not the 1:0 apsidal density wave as…

Earth and Planetary Astrophysics · Physics 2015-06-15 Matthew S. Tiscareno , Matthew M. Hedman , Joseph A. Burns , John W. Weiss , Carolyn C. Porco

We analyze far-infrared (10-650 cm$^{-1}$) emissivity spectra of Saturn's main rings obtained by the Cassini Composite Infrared Spectrometer (CIRS). In modeling of the spectra, the single scattering albedos of regolith grains are calculated…

Earth and Planetary Astrophysics · Physics 2015-06-11 Ryuji Morishima , Scott G. Edgington , Linda Spilker

We describe a search for dust created in collisions between the Saturnian irregular satellites using archival \emph{Spitzer} MIPS observations. Although we detected a degree scale Saturn-centric excess that might be attributed to an…

Earth and Planetary Astrophysics · Physics 2013-11-07 Grant M. Kennedy , Mark C. Wyatt , Kate Y. L. Su , John A. Stansberry

Previous investigations of Saturn's outer D ring (73,200-74,000 km from Saturn's center) identified periodic brightness variations whose radial wavenumber increased linearly over time. This pattern was attributed to a vertical corrugation,…

Earth and Planetary Astrophysics · Physics 2015-06-23 M. M. Hedman , J. A. Burns , M. R. Showalter

Gomes-J\'unior et al. (2015) published 3613 positions for the 8 largest irregular satellites of Jupiter and 1787 positions for the largest irregular satellite of Saturn, Phoebe. These observations were made between 1995 and 2014 and have an…

Earth and Planetary Astrophysics · Physics 2016-08-17 A. R. Gomes-Júnior , M. Assafin , L. Beauvalet , J. Desmars , R. Vieira-Martins , J. I. B. Camargo , B. E. Morgado , F. Braga-Ribas

Saturn's moon Iapetus, which is in synchronous rotation, is covered by an optically dark material mainly on its leading side, while its trailing side is significantly brighter. Because longer wavelengths probe deeper into the subsurface,…

Saturns rings are known to show remarkable real time variability in their structure. Many of which can be associated to interactions with nearby moons and moonlets. Possibly the most interesting and dynamic place in the rings, probably in…

Earth and Planetary Astrophysics · Physics 2016-09-12 Phil J Sutton , Feo Kusmartsev

To explore the formation and properties of Saturn's G ring, we study the dynamics of micron-sized dust particles originating from the arc of debris near the inner edge of the ring. The dynamical evolution of particles due to various…

Earth and Planetary Astrophysics · Physics 2025-07-22 Zhenghan Chen , Xiaodong Liu , Kun Yang