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Simulating Secondary Electron and Ion Emission from the Cassini Spacecraft in Saturn's Ionosphere

Miyake, Y.; Usui, H.; Johansson, F. L. +3 more

The Cassini spacecraft's Grand Finale flybys through Saturn's ionosphere provided unprecedented insight into the composition and dynamics of the gas giant's upper atmosphere and a novel and complex spacecraft-plasma interaction. In this article, we further study Cassini's interaction with Saturn's ionosphere using three-dimensional particle-in-cel…

Earth-based Stellar Occultation Predictions for Jupiter, Saturn, Uranus, Neptune, Titan, and Triton: 2023–2050

French, Richard G.; Souami, Damya

In support of studies of decadal-timescale evolution of outer solar system atmospheres and ring systems, we present detailed Earth-based stellar occultation predictions for Jupiter, Saturn, Uranus, Neptune, Titan, and Triton for 2023–2050, based on the Gaia Data Release 3 star catalog and near-IR K-band photometry from the Two Micron All Sky Surve…

Pits on Jupiter-family Comets and the Age of Cometary Surfaces

Guilbert-Lepoutre, Aurélie; Besse, Sébastien; Benseguane, Selma +4 more

Large and deep depressions, also known as pits, are observed at the surface of all Jupiter-family comets (JFCs) imaged by spacecraft missions. They offer the opportunity to glimpse the subsurface characteristics of comet nuclei and study the complex interplay between surface structures and cometary activity. This work investigates the evolution of…

Titan's North-South Haze Asymmetry Ratio and Boundary at Visible Wavelengths over the Cassini Mission

Barnes, Jason W.; Lorenz, Ralph D.; Vashist, Aadvik S. +2 more

We document the evolution of the north-south asymmetry (NSA) of Titan's haze albedo during the Cassini mission between 2004 and 2017. We analyze coadded cube images taken at 96 distinct wavelengths between 0.35 and 1.05 µm by the Cassini Visual and Infrared Mapping Spectrometer (VIMS-V) instrument from 14 Titan flybys. Over half of a Titan y…

New Insights into Aristarchus Crater with LRO LAMP Far-ultraviolet Observations

Hendrix, Amanda; Retherford, Kurt; Grava, Cesare +8 more

Aristarchus crater is a Copernican-age impact crater well known for its high-albedo ejecta blanket and nearby flow features rich in pyroclastic materials. The Lyman Alpha Mapping Project (LAMP) is a far-ultraviolet (FUV) spectrograph (57-197 nm) on board the Lunar Reconnaissance Orbiter (LRO). LAMP data identified Aristarchus crater as having a hi…

Erratum: "Temporal Evolution of Titan's Stratospheric Temperatures and Trace Gases from a Two-dimensional Retrieval of Cassini Composite Infrared Spectrometer Data" (2023, PSJ, 4, 140)

Achterberg, Richard K.