Article
Astronomy & Astrophysics
Hanlun Lei, Jian Li
Summary: In this study, retrograde mean motion resonances (MMRs) are investigated using analytical and numerical methods, leading to the proposal of a new resonant angle to describe retrograde MMRs. The analytical model is validated through non-perturbative analysis using Poincare surfaces of section, showing excellent correspondence with numerical results. Additionally, seven retrograde asteroids are found within the resonant zones of retrograde MMRs with Jupiter, suggesting potential implications for understanding the dynamical evolution of asteroids in retrograde MMRs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Valeri V. Makarov, Alexey Goldin, Alexei Tkachenko, Dimitri Veras, Benoit Noyelles
Summary: In a two-body system, celestial bodies approximated with rigid triaxial ellipsoids can rotate chaotically due to the time-varying gravitational torque from the central mass. At small orbital eccentricity values, rotation is relatively orderly and predictable, while at eccentricity approaching unity, chaos completely takes over.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
T. Ribeiro, O. C. Winter, D. Mourao, L. A. G. Boldrin, J. P. S. Carvalho
Summary: Recent observations have shown rings of particles around non-planetary bodies of the Solar system, which can be modelled by ellipsoids. The study found that for elongated bodies, adaptation of the initial velocity is needed to reduce radial variations in equatorial periodic orbits. Empirical equations were developed to calculate orbital eccentricity, initial velocity, and an adapted Kepler's Third Law based on physical parameters of the central body. Additionally, a shift in the primary body's location in relation to the elliptical orbit was identified.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Gustavo Madeira, Silvia M. Giuliatti Winter
Summary: This article studies the dynamics of the arcs of Neptune and co-orbital moonlets, proposing a model for their formation. By studying equilibrium configurations and the process of moonlets formation, possible mechanisms for the formation of the arcs are identified.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Petr Fatka, Nicholas A. Moskovitz, Petr Pravec, Marco Micheli, Maxime Devogele, Annika Gustafsson, Jay Kueny, Brian Skiff, Peter Kusnirak, Eric Christensen, Judit Ries, Melissa Brucker, Robert McMillan, Jeffrey Larsen, Ron Mastaler, Terry Bressi
Summary: A newly discovered pair of near-Earth objects (NEOs) were found to be genetically related asteroids that recently separated but still reside on similar orbits. Spectral analysis and orbit calculations suggested a common origin and a young age for this asteroid pair.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
D. Vokrouhlicky, J. Durech, J. Hanus, M. Ferrais, E. Jehin, Z. Benkhaldoun
Summary: The study confirms the prograde rotation of Lacrimosa and suggests that it initially had slightly larger obliquity and longer rotation period, causing it to evolve differently from other large prograde-rotating Koronis members. In the future, it is expected to be captured in a different state corresponding to the proper mode of orbital plane precession.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
I. Kyrylenko, Yu. N. Krugly, O. Golubov
Summary: The study discovered ten new probable asteroid pairs in the inner part of the main belt using a new pipeline for asteroid pair search, and confirmed the accuracy of the pipeline by testing it on a sample of 17 known pairs, with age estimates agreeing with those in the literature in most cases.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
D. Vokrouhlicky, M. Broz, B. Novakovic, D. Nesvorny
Summary: The Hobson family has an unusual size distribution, with two nearly equal-size bodies followed by smaller asteroids following a characteristic power law distribution. The data can be explained either by a canonical impact onto a single parent body with fine-tuned impact conditions or by an unconventional model of the parent object as a binary system with specific primary and secondary size ratios. The upper limit of dispersal velocity for known members of the Hobson family is estimated to be approximately (10-20) m s(-1), consistent with both formation models.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
D. Vokrouhlicky, B. Novakovic, D. Nesvorny
Summary: This study investigates the very young Adelaide family in the main asteroid belt and finds that while it is closely related to the previously known Datura family in terms of orbital elements, it is unlikely that the formation events of the two families are causally linked. The ages of the two families, despite suspiciously overlapping, are likely just a coincidence.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
B. Carry, W. Thuillot, F. Spoto, P. David, J. Berthier, P. Tanga, F. Mignard, S. Bouquillon, R. A. Mendez, J. -P. Rivet, A. Le Van Suu, A. Dell'Oro, G. Fedorets, B. Frezouls, M. Granvik, J. Guiraud, K. Muinonen, C. Panem, T. Pauwels, W. Roux, G. Walmsley, J. -M. Petit, L. Abe, V. Ayvazian, K. Baillie, A. Baransky, P. Bendjoya, M. Dennefeld, J. Desmars, S. Eggl, V. Godunova, D. Hestroffer, R. Inasaridze, V. Kashuba, Y. N. Krugly, I. E. Molotov, V. Robert, A. Simon, I. Sokolov, D. Souami, V. Tarady, F. Taris, V. Troianskyi, V. Vasylenko, D. Vernet
Summary: The Gaia mission has been surveying the sky and identifying Solar System objects since July 2014. By comparing positions and calling for follow-up observations, they have successfully recovered over 200 objects, with a trend showing difficulties in identifying high-inclination objects.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Marco Fenucci, Giovanni F. F. Gronchi, Bojan Novakovic
Summary: This study used an averaged semi-analytical model to calculate the orbital dynamics of NEOs and determined the location of the long-period resonances with the planets from Venus to Saturn, showing that they are located within the NEO region.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
D. Vokrouhlicky, P. Fatka, M. Micheli, P. Pravec, E. J. Christensen
Summary: This study analyzes the orbital elements of main-belt objects (458271) 2010 UM26 and 2010 RN221 and concludes that they are the youngest known asteroid pair, likely forming around 2003.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Anatolii Kazantsev, Lilia Kazantseva
Summary: This paper analyzes the possible transfers of bodies from the main asteroid belt to the Centaur region by studying the orbits of asteroids in the 2:1 mean motion resonance with Jupiter. Through numerical calculations, it is found that six bodies have moved from the 2:1 commensurability zone to the Centaur population. Accuracy estimations confirm the potential asteroid transfers to the Centaur region.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Giorgi Kokaia, Melvyn B. Davies, Alexander J. Mustill
Summary: The article discusses the formation of stars in dense clusters and the transfer of planets between stars during close encounters. It examines how these captured planets affect Kuiper belt-like planetesimal belts in their new systems, showing that they can destabilize the belt and impact habitable planets. The study finds that when a Jupiter-mass planet is captured, it can destabilize giant planets in the system, deplete the belt, or create a flux of impactors detrimental to the development of life.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
X. J. Xi, A. Vienne
Summary: This study aims to construct new synthetic representations of the JPL Titan ephemeris in order to obtain the complete combinations of the osculating elements. By using an analytical representation method, the advantages of both the TASS system and the high precision of JPL can be achieved.
ASTRONOMY & ASTROPHYSICS
(2022)
