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The first observations of Saturn's visible-wavelength aurora were made by the Cassini camera. The aurora was observed between 2006 and 2013 in the northern and southern hemispheres. The color of the aurora changes from pink at a few hundred…

Earth and Planetary Astrophysics · Physics 2015-10-28 Ulyana A. Dyudina , Andrew P. Ingersoll , Shawn P. Ewald , Danika Wellington

We present a review of Saturn's interior structure and thermal evolution, with a particular focus on work in the past 5 years. Data from the Cassini mission, including a precise determination of the gravity field from the Grand Finale…

The so-called "Charming Ringlet" (R/2006 S3) is a low-optical-depth, dusty ringlet located in the Laplace gap in the Cassini Division. This ringlet is particularly interesting because its radial position varies systematically with longitude…

Earth and Planetary Astrophysics · Physics 2010-10-01 M. M. Hedman , J. A. Burt , J. A. Burns , M. S. Tiscareno

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,…

Recent studies of stellar occultations observed by the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft have demonstrated that multiple spiral wave structures in Saturn's rings are probably generated by…

Earth and Planetary Astrophysics · Physics 2018-12-24 M. M. Hedman , P. D. Nicholson , R. G. French

Many small moonlets, creating propeller structures, have been found in Saturn's rings by the Cassini spacecraft. We study the dynamical evolution of such 20-50m sized bodies which are embedded in Saturn's rings. We estimate the importance…

Earth and Planetary Astrophysics · Physics 2010-11-23 Hanno Rein , John C. B. Papaloizou

The accurate determination of Saturn's gravitational coefficients by Cassini could provide tighter constrains on Saturn's internal structure. Also, occultation measurements provide important information on the planetary shape which is often…

Earth and Planetary Astrophysics · Physics 2015-06-15 Ravit Helled , Tristan Guillot

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

Saturn's main rings exhibit variations in both their opacity and spectral properties on a broad range of spatial scales, and the correlations between these parameters can provide insights into the processes that shape the composition and…

Earth and Planetary Astrophysics · Physics 2013-01-14 M. M. Hedman , P. D. Nicholson , J. N. Cuzzi , R. N. Clark , G. Filacchione , F. Capaccioni , M. Ciarniello

The Cassini Division in Saturn's rings contains a series of eight named gaps, three of which contain dense ringlets. Observations of stellar occultations by the Visual and Infrared Mapping Spectrometer onboard the Cassini spacecraft have…

Earth and Planetary Astrophysics · Physics 2010-01-07 M. M. Hedman , P. D. Nicholson , K. H. Baines , B. J. Buratti , C. Sotin , R. N. Clark , R. H. Brown , R. G. French , E. A. Marouf

Certain spiral density waves in Saturn's rings are generated through resonances with planetary normal modes, making them valuable probes of Saturn's internal structure. Previous research has primarily focused on the rotation rates of these…

The co-orbital satellites of Saturn, Janus and Epimetheus, swap radial positions every 4.0 years. Since \textit{Cassini} has been in orbit about Saturn, this has occurred on 21 January in 2006, 2010, and 2014. We describe the effects of…

Earth and Planetary Astrophysics · Physics 2016-07-19 Morgan E. Rehnberg , Larry W. Esposito , Zarah L. Brown , Nicole Albers , Miodrag Sremčević , Glen R. Stewart

We identify multiple periodic dusty structures in Saturn's Roche Division, a faint region spanning the $\sim3000$ km between the A and F rings. The locations and extent of these features vary over Cassini's tour of the Saturn system, being…

Earth and Planetary Astrophysics · Physics 2019-04-24 R. O. Chancia , M. M. Hedman , S. W. H. Cowley , G. Provan , S. -Y. Ye

The astronomer E.V. Pitjeva, by analyzing with the EPM2008 ephemerides a large number of planetary observations including also two years (2004-2006) of normal points from the Cassini spacecraft, phenomenologically estimated a statistically…

General Relativity and Quantum Cosmology · Physics 2009-02-24 Lorenzo Iorio

Saturn's F ring is subject to dynamic structural changes over short periods. Among the observed phenomena are diffuse extended bright clumps (ECs) ~ 3-40 degrees in longitudinal extent. These ECs appear, evolve, and disappear over a span of…

Earth and Planetary Astrophysics · Physics 2014-08-13 Robert S. French , Shannon K. Hicks , Mark R. Showalter , Adrienne K. Antonsen , Douglas R. Packard

We present an extensive data set of ~150 localized features from Cassini images of Saturn's Ring A, a third of which are demonstrated to be persistent by their appearance in multiple images, and half of which are resolved well enough to…

Astrophysics · Physics 2008-02-14 Matthew S. Tiscareno , Joseph A. Burns , Matthew M. Hedman , Carolyn C. Porco

We present a study of the behavior of Saturn's A ring outer edge, using images and occultation data obtained by the Cassini spacecraft over a period of 8 years from 2006 to 2014. More than 5000 images and 170 occultations of the A ring…

The ejecta discharged by impacting meteorites can redistribute a planetary ring's mass and angular momentum. This `ballistic transport' of ring properties instigates a linear instability that could generate the 100--1000-km undulations…

Earth and Planetary Astrophysics · Physics 2015-10-14 Henrik Latter , Gordon Ogilvie , Marie Chupeau

At the solar equinox in August 2009, the Composite Infrared Spectrometer (CIRS) onboard Cassini showed the lowest Saturn's ring temperatures ever observed. Detailed radiative transfer models show that the observed equinox temperatures of…

Earth and Planetary Astrophysics · Physics 2015-09-01 Ryuji Morishima , Linda Spilker , Shawn Brooks , Estelle Deau , Stu Pilorz

The Cassini mission entered the Grand Finale phase in April 2017 and executed 22.5 highly inclined, close-in orbits around Saturn before diving into the planet on September 15th 2017. Here we present our analysis of the Cassini Grand Finale…

Earth and Planetary Astrophysics · Physics 2019-11-19 Hao Cao , Michele K. Dougherty , Gregory J. Hunt , Gabrielle Provan , Stanley W. H. Cowley , Emma J. Bunce , David J. Stevenson