Results 111 to 120 of about 824,786 (237)

9. Some Interrelations of Asteroids, Trojans and Satellites [PDF]

International Astronomical Union Colloquium, 1977
The Trojans of Jupiter have the same magnitude-frequency distribution as the asteroids, but there is a puzzling asymmetry of the densities in Preceding and Following Lagrangian points. The outer satellites of Jupiter have a peculiar magnitude-frequency distribution, with large and also small ones missing; they therefore cannot be captured asteroids or ...
openaire   +1 more source

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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Considering Contact Forces during the Formation of Planetesimals by Gravitational Collapse: Mutual Orbits, Spin States, and Shapes

The Astrophysical Journal
In this work, we apply a soft-sphere discrete element method (SSDEM) within the PKDGRAV N -body integrator to investigate the formation of planetesimal systems through the gravitational collapse of clouds of superparticles. Previously published numerical
Jackson T. Barnes, Stephen R. Schwartz, Seth A. Jacobson   +2 more
doaj   +1 more source

Radar Investigations of Asteroids [PDF]

Radar investigations of asteroids, including observations during 1984 to 1985 of at least 8 potential targets and continued analyses of radar data obtained during 1980 to 1984 for 30 other asteroids is proposed.
Ostro, S. J.
core   +1 more source

High-speed Boulders and the Debris Field in DART Ejecta

The Planetary Science Journal
On 2022 September 26 the Double Asteroid Redirection Test (DART) spacecraft collided with Dimorphos, the moon of the near-Earth asteroid 65803 Didymos, in a full-scale demonstration of a kinetic impactor concept.
Tony L. Farnham, Jessica M. Sunshine, Masatoshi Hirabayashi, Carolyn M. Ernst, R. Terik Daly, Harrison F. Agrusa, Olivier S. Barnouin, Jian-Yang Li, Kathryn M. Kumamoto, Megan Bruck Syal, Sean E. Wiggins, Evan Bjonnes, Angela M. Stickle, Sabina D. Raducan, Andrew F. Cheng, David A. Glenar, Ramin Lolachi, Timothy J. Stubbs, Eugene G. Fahnstock, Marilena Amoroso, Ivano Bertini, John R. Brucato, Andrea Capannolo, Gabriele Cremonese, Massimo Dall’Ora, Vincenzo Della Corte, J. D. P. Deshapriya, Elisabetta Dotto, Igor Gai, Pedro H. Hasselmann, Simone Ieva, Gabriele Impresario, Stavro L. Ivanovski, Michèle Lavagna, Alice Lucchetti, Francesco Marzari, Elena Mazzotta Epifani, Dario Modenini, Maurizio Pajola, Pasquale Palumbo, Simone Pirrotta, Giovanni Poggiali, Alessandro Rossi, Paolo Tortora, Marco Zannoni, Giovanni Zanotti, Angelo Zinzi   +46 more
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Radar and Optical Observations and Physical Modeling of Binary Near-Earth Asteroid 2018 EB

The Planetary Science Journal
We report radar, photometric, and visible-wavelength spectrophotometry observations of NEA 2018 EB obtained in 2018. The radar campaign started at Goldstone (8560 MHz, 3.5 cm) on April 7, and it was followed by more extensive observations from October 5 ...
Marina Brozović, Lance A. M. Benner, Shantanu P. Naidu, Nicholas Moskovitz, Jon D. Giorgini, Anne K. Virkki, Sean E. Marshall, Lord R. Dover, Agata Rożek, Stephen C. Lowry, Brian D. Warner, Patrick A. Taylor, Edgard G. Rivera-Valentin, Timothy A. Lister, Joseph P. Chatelain, Michael W. Busch, Christopher Magri, Joseph S. Jao, Lawrence G. Snedeker, Kenneth J. Lawrence   +19 more
doaj   +1 more source

Synchronous Rotation in the (120347) Salacia–Actaea System

The Planetary Science Journal
We report on roughly 16 yr of photometric monitoring of the trans-Neptunian binary system (120347) Salacia–Actaea, which provides significant evidence that Salacia and Actaea are tidally locked to the mutual orbital period in a fully synchronous ...
Cameron Collyer, Estela Fernández-Valenzuela, Jose Luis Ortiz, Bryan J. Holler, Benjamin Proudfoot, Nicolás Morales, Rafael Morales, Susan Benecchi, Flavia L. Rommel, Will Grundy, Darin Ragozzine   +10 more
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A Change of the Rotation Period of Asteroid (65803) Didymos Caused by the DART Impact

The Planetary Science Journal
On 2022 September 26, the NASA Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the secondary component of the binary asteroid (65803) Didymos. This experiment tested the kinetic impactor technology for diverting dangerous asteroids.
Josef Ďurech, Petr Pravec, Masatoshi Hirabayashi, Derek C. Richardson, Harrison Agrusa, Ryota Nakano   +5 more
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Spectroscopy of faint asteroids, satellites, and comets

The Astronomical Journal, 1980
Nineteen asteroids with orbital elements comparable to those of short-period comets and the outer Jovian satellites J6 Himalia and J7 Elara have been observed with the 228-cm telescope and image-tube spectrograph of Steward Observatory. No activity indicating cometary outgassing was detected.
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Categorization of Spatial and Temporal Ejecta Outcomes in Binary Systems Based on Variations of the Didymos System

The Planetary Science Journal
With the increasing number of binary asteroid systems being discovered, ejecta studies must expand from solely investigating single-body systems to modeling more complex multiple-body systems. For example, the Double Asteroid Redirection Test provides an
Jennifer N. Larson, Yanga Fernandez, Gal Sarid   +2 more
doaj   +1 more source