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Solar system dynamics
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In this paper, the two-body problem and the restricted three body problem are considered. And the disturbing function is extended to include the spin-orbit coupling and the resonance perturbations.Abstract:
Preface 1 Structure of the solar system 2 The two-body problem 3 The restricted three-body problem 4 Tides, rotation and shape 5 Spin-orbit coupling 6 The disturbing function 7 Secular perturbations 8 Resonant perturbations 9 Chaos and long-term evolution 10 Planetary rings Appendix A Solar system data Appendix B Expansion of the disturbing function Indexread more
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Titan’s internal structure and the evolutionary consequences
TL;DR: Titan's moment of inertia (MoI), estimated from the quadrupole gravity field measured by the Cassini spacecraft, is 0.342, which has been interpreted as evidence of a partially differentiated internal mass distribution.
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Endgame Problem Part 2: Multibody Technique and the Tisserand-Poincare Graph
TL;DR: The Tisserand-Poincare graph shows that ballistic endgames are energetically possible and it explains why they require resonant orbits patched with high-altitude flybys, whereas in the ν ∞ -leveraging-maneuver approach, flybys alone are not effective without impulsive maneuvers in between them.
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Observational biases in determining extrasolar planet eccentricities in single‐planet systems
TL;DR: In this paper, the authors investigate potential biases in the measurements of exoplanet orbital parameters obtained from radial velocity observations for single-planet systems and create a mock catalogue of radial velocity data, choosing input planet masses, periods and observing patterns from actual radial velocity surveys and varying input eccentricities.
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Mean radius and shape of Pluto and Charon from New Horizons images
Francis Nimmo,Orkan M. Umurhan,Carey M. Lisse,Carver J. Bierson,Tod R. Lauer,Marc W. Buie,Henry B. Throop,J. A. Kammer,James H. Roberts,William B. McKinnon,Amanda M. Zangari,Jeffrey M. Moore,S. Alan Stern,Leslie A. Young,Harold A. Weaver,Catherine B. Olkin,Kim Ennico +16 more
TL;DR: In this article, the mean radii and shapes of Pluto and Charon were estimated using LORRI images during the New Horizons spacecraft encounter, and the corresponding densities are 1854 −± −11 −kg/m3 and 1701 −±−33 −kg /m3, respectively.
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On the Origin of the Trojan Asteroids: Effects of Jupiter's Mass Accretion and Radial Migration
TL;DR: In this article, the effects of Jupiter's accretion of nebular gas and the planet's radial migration on its Trojan companions were analyzed using the planar circular restricted three-body problem.