Results 81 to 90 of about 1,119 (184)

Fully Coherent Model of Dynamics around Binary Asteroids: Application to Didymos and the DART Impact

The Planetary Science Journal
The dynamical environment around binary asteroids has been studied in depth, but these models typically make assumptions about the eccentricity, shapes, or rotational stability of the asteroids.
Alex J. Meyer, Daniel J. Scheeres
doaj   +1 more source

Catalog of Proper Orbits for 1.25 Million Main-belt Asteroids and Discovery of 136 New Collisional Families

The Astrophysical Journal Supplement Series
The proper elements of asteroids are obtained from the instantaneous orbital elements by removing periodic oscillations produced by gravitational interactions with planets.
David Nesvorný, Fernando Roig, David Vokrouhlický, Miroslav Brož   +3 more
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Orbital Transfers in a Binary Asteroid System Considering Flattening of the Bodies and Solar Radiation Pressure

Aerospace
This paper aims to investigate the effects of asteroid size and shape and solar radiation pressure in the trajectories of a spacecraft in transfers between the collinear equilibrium points of a binary non-spherical asteroid system.
L. B. T. Santos, V. Y. Razoumny, V. M. Gomes, A. F. B. A. Prado   +3 more
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Encounter Circumstances of Asteroid 99942 Apophis with the Catalog of Known Asteroids

The Planetary Science Journal
Asteroid 99942 Apophis will pass near Earth in 2029 April. Expected to miss our planet by a safe margin, that could change if Apophis's path were perturbed by a collision with another asteroid in the interim.
Paul Wiegert, Benjamin Hyatt
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Dimorphos’s Orbit Period Change and Attitude Perturbation due to Its Reshaping after the DART Impact

The Planetary Science Journal
On 2022 September 26 (UTC), NASA's Double Asteroid Redirection Test (DART) mission achieved a successful impact on Dimorphos, the secondary component of the near-Earth binary asteroid system (65803) Didymos. Subsequent ground-based observations suggest a
Ryota Nakano, Masatoshi Hirabayashi, Sabina D. Raducan, Petr Pravec, Shantanu P. Naidu, Harrison F. Agrusa, Steven Chesley, Fabio Ferrari, Martin Jutzi, Colby C. Merrill, Alex J. Meyer, Patrick Michel, Derek C. Richardson, Paul Sánchez, Peter Scheirich, Stephen R. Schwartz, Yun Zhang, Adriano Campo Bagatin, Po-Yen Liu, Andrew F. Cheng   +19 more
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Evidence for YORP-induced Spin Deceleration in Asteroid (433) Eros

The Astrophysical Journal
Theoretically, the Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) effect induced by thermal reemission from asteroid surfaces can either accelerate or decelerate their rotation.
Shuai Feng, Shaoming Hu, Xu Chen, Liyong Zhou, Yangbo Xu, Zehua Qi   +5 more
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Pre-impact Thermophysical Properties and the Yarkovsky Effect of NASA DART Target (65803) Didymos

The Planetary Science Journal
The NASA Double Asteroid Redirection Test (DART) spacecraft impacted the secondary body of the binary asteroid (65803) Didymos on 2022 September 26 and altered its orbit about the primary body.
Benjamin Rozitis, Simon F. Green, Samuel L. Jackson, Colin Snodgrass, Cyrielle Opitom, Thomas G. Müller, Ulrich C. Kolb, Steven R. Chesley, R. Terik Daly, Cristina A. Thomas, Andrew S. Rivkin   +10 more
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Direct N-body Simulations of Satellite Formation around Small Asteroids: Insights from DART’s Encounter with the Didymos System

The Planetary Science Journal
We explore binary asteroid formation by spin-up and rotational disruption considering the NASA DART mission's encounter with the Didymos–Dimorphos binary, which was the first small binary visited by a spacecraft.
Harrison F. Agrusa, Yun Zhang, Derek C. Richardson, Petr Pravec, Matija Ćuk, Patrick Michel, Ronald-Louis Ballouz, Seth A. Jacobson, Daniel J. Scheeres, Kevin Walsh, Olivier Barnouin, R. Terik Daly, Eric Palmer, Maurizio Pajola, Alice Lucchetti, Filippo Tusberti, Joseph V. DeMartini, Fabio Ferrari, Alex J. Meyer, Sabina D. Raducan, Paul Sánchez   +20 more
doaj   +1 more source

Precise Orbit Determination of Mars-crossing Asteroids

The Astronomical Journal
This study investigates the orbit determination of the Mars-crossing asteroids (MCAs) with a focus on the possibility of detecting their Yarkovsky signals. We analyze the influences of force model uncertainties on MCA orbits, including the uncertainty of
Xin Liu, Xi-Yun Hou, Jun Yao, Shanhong Liu, Roberto Armellin, Qingbo Gan, Zhitao Yang   +6 more
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Gauss-Radau Small-body Simulator (GRSS): An Open-source Library for Planetary Defense

The Planetary Science Journal
We present GRSS , a small-body propagation and orbit determination library specifically designed for planetary defense applications. GRSS is an end-to-end, open-source software tool that begins with optical observations obtained from the Minor Planet ...
Rahil Makadia, Davide Farnocchia, Steven R. Chesley, Siegfried Eggl   +3 more
doaj   +1 more source