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The absolute magnitude and perihelion distributions of long-period comets are derived, using data from the Lincoln Near-Earth Asteroid Research (LINEAR) survey. The results are surprising in three ways. Firstly, the flux of comets through…

Astrophysics · Physics 2016-08-30 P. J. Francis

This study investigates the different novel forms of the dynamical equations of a particle orbiting a rotating asteroid and the effective potential, the Jacobi integral, etc. on different manifolds. Nine new forms of the dynamical equations…

Earth and Planetary Astrophysics · Physics 2015-06-18 Yu Jiang , Hexi Baoyin

We report the discovery of activity emanating from (18916) 2000 OG44 (alternately designated 1977 SD), a minor planet previously reported to be both an extinct comet or an asteroid on a cometary orbit. We observed 2000 OG44 with a thin tail…

Earth and Planetary Astrophysics · Physics 2025-07-30 Colin Orion Chandler , William J. Oldroyd , Chadwick A. Trujillo , Dmitrii E. Vavilov , William A. Burris

This work introduces Neural Chronos Ordinary Differential Equations (Neural CODE), a deep neural network architecture that fits a continuous-time ODE dynamics for predicting the chronology of a system both forward and backward in time. To…

Machine Learning · Computer Science 2025-03-27 C. Coelho , M. Fernanda P. Costa , L. L. Ferrás

While orbital analysis studies were so far mainly focused on the Galactic halo, it is possible now to do these studies in the heavily obscured region close to the Galactic Centre. We aim to do a detailed orbital analysis of stars located in…

Astrophysics of Galaxies · Physics 2024-03-04 N. Nieuwmunster , M. Schultheis , M. Sormani , F. Fragkoudi , F. Nogueras-Lara , R. Schödel , P. McMillan

This article presents a family of Stochastic Cartographic Occupancy Prediction Engines (SCOPEs) that enable mobile robots to predict the future states of complex dynamic environments. They do this by accounting for the motion of the robot…

Robotics · Computer Science 2025-09-08 Zhanteng Xie , Philip Dames

We present the unTimely Catalog, a deep time-domain catalog of detections based on Wide-field Infrared Survey Explorer (WISE) and NEOWISE observations spanning the 2010 through 2020 time period. Detections are extracted from 'time-resolved…

Instrumentation and Methods for Astrophysics · Physics 2023-01-18 A. M. Meisner , D. Caselden , E. F. Schlafly , F. Kiwy

Recent progress of symbolic dynamics of one- and especially two-dimensional maps has enabled us to construct symbolic dynamics for systems of ordinary differential equations (ODEs). Numerical study under the guidance of symbolic dynamics is…

chao-dyn · Physics 2009-10-30 Bai-lin Hao , Jun-xian Liu , Wei-mou Zheng

We present orbital elements, orbital parallaxes and individual component masses, for fourteen spatially resolved double-line spectroscopic binaries derived doing a simultaneous fit of their visual orbit and radial velocity curve. This was…

Solar and Stellar Astrophysics · Physics 2022-02-16 Jennifer Anguita-Aguero , Rene A. Mendez , Ruben M. Claveria , Edgardo Costa

Comets are the most pristine planetesimals left from the formation of the Solar System. They carry unique information on the materials and the physical processes which led to the presence of planets and moons. Many important questions about…

Earth and Planetary Astrophysics · Physics 2025-03-10 Roberto Flores , Alessandro Beolchi , Elena Fantino , Chiara Pozzi , Mauro Pontani , Ivano Bertini , Cesare Barbieri

Samarasinha & Mueller (2013) related changes of cometary rotation to other physical parameters for four Jupiter family comets defining a parameter $X$, which is approximately constant within a factor of two irrespective of the active…

Earth and Planetary Astrophysics · Physics 2018-08-29 Beatrice E. A. Mueller , Nalin H. Samarasinha

We present the open source Python code BinaryStarSolver that solves for the orbital elements of a spectroscopic binary system. Given a time-series of radial velocity measurements, six orbital parameters are determined: the long-term mean,…

Solar and Stellar Astrophysics · Physics 2020-11-30 Nicholas Milson , Caroline Barton , Philip D. Bennett

We present a catalog (status July 1, 2022) of triple and higher order systems identified containing exoplanets based on data from the literature, including various analyses. We explore statistical properties of the systems with focus on…

Solar and Stellar Astrophysics · Physics 2022-12-14 M. Cuntz , G. E. Luke , M. J. Millard , L. Boyle , S. D. Patel

Planetesimals in the primordial disc may have experienced a collisional cascade. If so, the comet nuclei later placed in the Kuiper belt, scattered disc, and Oort Cloud would primarily be fragments and collisional rubble piles from that…

Earth and Planetary Astrophysics · Physics 2023-09-20 Björn J. R. Davidsson

The 163 comets observed during the WISE/NEOWISE prime mission represent the largest infrared survey to date of comets, providing constraints on dust, nucleus sizes, and CO+CO2 production. We present detailed analyses of the WISE/NEOWISE…

We present the first results from the COSINE (Cometary Object Study Investigating their Nature and Evolution) project, based on a uniformly processed dataset of 484 comets observed over the full 15-year duration of the WISE/NEOWISE mission.…

This is the second in a series of papers whose aim is to generate ``adiabatic'' gravitational waveforms from the inspiral of stellar-mass compact objects into massive black holes. In earlier work, we presented an accurate (2+1)D…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Pranesh A. Sundararajan , Gaurav Khanna , Scott A. Hughes , Steve Drasco

In the present article, we present a new gravitational galactic model, describing motion in elliptical as well as in disk galaxies, by suitably choosing the dynamical parameters. Moreover, a new dynamical parameter, the S(g) spectrum, is…

Astrophysics of Galaxies · Physics 2012-04-03 Euaggelos E. Zotos

The data obtained in the recent Rosetta space mission to comet 67P/Churyumov-Gerasimenko have had a profound impact on the understanding of the nature of comets. In addition to revising the notions on the physical properties and structure…

Earth and Planetary Astrophysics · Physics 2019-12-24 V. V. Emel'yanenko

In this paper we consider the following modification of the iterative search problem. We are given a tree $T$, so that a dynamic catalog $C(v)$ is associated with every tree node $v$. For any $x$ and for any node-to-root path $\pi$ in $T$,…

Data Structures and Algorithms · Computer Science 2010-07-21 Yakov Nekrich
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