Results 61 to 70 of about 135,263 (156)

Are Thalassa and Despina in Resonance Lock with Neptune’s Oscillations?

The Astronomical Journal
The two innermost moons of Neptune, Naiad and Thalassa, are currently in a 73:69 mean-motion resonance. This resonance relies on the large inclination of Naiad, and we estimate that Naiad requires multiple Gyr to reach its 4 $\mathop{.}\limits^{\unicode ...
Matija Ćuk, Harrison F. Agrusa, Marina Brozović, Matthew M. Hedman   +3 more
doaj   +1 more source

Clumped Isotope Signatures of Abiotic Methane: The Role of the Combinatorial Isotope Effect

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 7, July 2024.
Abstract Methane clumped isotope signatures of abiogenesis may be diagnostic of the origin of methane on Earth and other planetary bodies. We performed synthesis of abiogenic methane in hydrothermal conditions between 130 and 300°C and determined δ13C, δD, Δ13CH3D, and Δ12CH2D2.
Jabrane Labidi, Thomas M. McCollom, Thomas Giunta, Barbara Sherwood Lollar, William D. Leavitt, Edward D. Young   +5 more
wiley   +1 more source

JWST Reveals Varied Origins between Jupiter’s Irregular Satellites

The Planetary Science Journal
We report JWST NIRSpec (0.7–5.1 μ m) observations of eight Jovian irregular satellites across five orbital groups. We detect variation in the phyllosilicate content of the three largest members of the Himalia collisional family (Himalia, D  ∼ 140 km ...
Benjamin N. L. Sharkey, Andrew S. Rivkin, Richard J. Cartwright, Bryan J. Holler, Joshua P. Emery, Cristina Thomas   +5 more
doaj   +1 more source

The Near-Centaur Environment: Satellites, Rings, and Debris

The unexpected finding of a ring system around the Centaur (10199) Chariklo opened a new window for dynamical studies and posed many questions about the formation and evolutionary mechanisms of Centaurs as well as the relationship to satellites and ...
Sickafoose, Amanda A., Woodney, Laura M., Giuliatti Winter, Silvia M., Ragozzine, Darin, Leiva, Rodrigo, Olkin, Cathy B., Lilly, Eva, Souza-Feliciano, A.C., Seccull, Tom, Licandro, Javier, Álvarez-Candal, Alvaro, Peixinho, Nuno   +11 more
core   +1 more source

Does the Neptunian system of satellites challenge a gravitational origin for the Pioneer anomaly?

, 2009
LaTex2e, 9 pages, 3 tables, 3 figures. To appear in Monthly Notices of the Royal Astronomical Society (MNRAS). Latest data from the perihelion precessions of Uranus, Neptune and Pluto added. Confrontation with the Pioneer Anomaly-induced perihelion precessions included.
openaire   +2 more sources

A Unification of Models of Tethered Satellites [PDF]

, 2011
In this paper, different conservative models of tethered satellites are related mathematically, and it is established in what limit they may provide useful insight into the underlying dynamics.
Kristiansen, K. Uldall, Roberts, M., Roberts, M, M. Roberts, Palmer, P, K. Uldall Kristiansen, Kristiansen, KU, P. Palmer, Palmer, P.   +8 more
core   +1 more source

Properties of the Irregular Satellite System around Uranus Inferred from K2, Herschel, and Spitzer Observations [PDF]

, 2017
In this paper, we present visible-range light curves of the irregular Uranian satellites Sycorax, Caliban, Prospero, Ferdinand, and Setebos taken with the Kepler Space Telescope over the course of the K2 mission.
Mommert, M., Kiss, Cs., Müller, T., M. Mommert, Szabó, Gy. M., Szabo, GM, Mommert, M, Hanyecz, O, Kiss, C., Pál, A., Kiss, C, Molnar, L, R. Szakáts, Kiss, LL, Cs. Kiss, K. Sárneczky, L. L. Kiss, Szabo, R, Farkas-Takacs, A, R. Szabó, Muller, T, Farkas-Takács, A., Hanyecz, O., G. Marton, T. Müller, A. Farkas-Takács, A. Pál, Gy. M. Szabó, Szabó, G., Szabó, R., Marton, G, L. Molnár, Sarneczky, K, Sárneczky, K., Molnár, L., Kiss, L. L., Kiss, L., Szakats, R, Szakáts, R., Marton, G., Pal, A, O. Hanyecz, Szakáts, Róbert, Kiss, L. László, Sárneczky, Krisztián, Kiss, Csaba, Molnár, László, Takácsné Farkas, Anikó, Marton, Gábor, Szabó, Róbert, Szabó M., Gyula, Pál, András   +51 more
core   +1 more source

Trans-Neptunian Binary Mutual Events in the 2020s and 2030s

The Astrophysical Journal Letters
Mutual events of trans-Neptunian binaries (TNBs) provide rare opportunities to measure the physical and orbital properties of small bodies in the outer solar system.
Benjamin Proudfoot, Will Grundy, Darin Ragozzine   +2 more
doaj   +1 more source

Evidence of a New Arc or a Belt of Small Satellites around (50000) Quaoar

The Astrophysical Journal Letters
We report the results of an observation of a stellar occultation by the (50000) Quaoar system, observed on 2025 June 25. Observations were made from 10 sites in the USA in an attempt to detect Quaoar’s Q1R ring.
Felipe Braga-Ribas, Chrystian L. Pereira, Bruno Sicardy, Bruno E. Morgado, Jose-Luis Ortiz, Gustavo Madeira, Giuliano Margoti   +6 more
doaj   +1 more source

Temperature, Albedo, and Emissivity of Triton and Proteus from Voyager 2 IRIS Data

The Planetary Science Journal
The Voyager 2 infrared interferometer and spectrometer (IRIS) spectra for Triton are revisited, and the Proteus IRIS spectra are looked at for the first time. Fifty more spectra are added to the average of 16 previously used for Triton.
Garrett Nobis, Vincent Chevrier
doaj   +1 more source