Results 51 to 60 of about 1,071 (195)

Mineral Extraction Scenarios From an Asteroid via Optimization Considering Rotational Dynamics

IEEE Access
This study examines how removing surface materials affects the rotational dynamics of an asteroid to design efficient asteroid mining plans. The simulations solve Euler’s equations and track variations in the inertia tensor, angular momentum, and ...
Seyedmahdiar Ziaolhagh, Mahdi Jafari-Nadoushan   +1 more
doaj   +1 more source

Al‐Khadhaf: The first camera‐observed (H5–6) meteorite fall from Oman

Meteoritics &Planetary Science, EarlyView.
Abstract A fireball camera system installed in 2022 by the Oman Meteorite Monitoring Project (OMMP) as part of the Global Fireball Observatory (GFO) recorded a 3.2 s fireball on March 8, 2022 at 8:15 p.m. UTC. A meteoroid of 4 ± 2 kg entered the atmosphere at 14.0 km/s.
Anna Zappatini, Edwin Gnos, Beda A. Hofmann, Urs Eggenberger, Pascal M. Kruttasch, Frank Gfeller, Mohammad Tauseef, Ingo Leya, Hadrien A. R. Devillepoix, Eleanor K. Sansom, Martin Cupák, Sophie E. Deam, Thomas W. C. Stevenson, Peter Jenniskens, Sebastian Lindemann, Beat Booz, Muati. S. Al‐Muati, Abdulmunaim A. Al‐Zakwani, Hussain A. Al‐Ghafri   +18 more
wiley   +1 more source

Dimorphos Orbit Determination from Mutual Events Photometry

The Planetary Science Journal
The NASA Double Asteroid Redirection Test spacecraft successfully impacted the Didymos–Dimorphos binary asteroid system on 2022 September 26 UTC.
Peter Scheirich, Petr Pravec, Alex J. Meyer, Harrison F. Agrusa, Derek C. Richardson, Steven R. Chesley, Shantanu P. Naidu, Cristina Thomas, Nicholas A. Moskovitz   +8 more
doaj   +1 more source

Initial study of regolith exposure ages and burial conditions on Ryugu: Cosmogenic nuclides score in two touchdowns

Meteoritics &Planetary Science, EarlyView.
Abstract Surface processes on the asteroid Ryugu have been investigated using cosmic‐ray‐produced radionuclides, 10Be, 26Al, and 36Cl, and stable noble gases, on eight samples returned by the Hayabusa2 spacecraft. The 10Be and 26Al along with 21Ne measurements indicate that the two Chamber A samples A0105 collected during the first touchdown (TD) were ...
Kunihiko Nishiizumi, Keisuke Nagao, Marc W. Caffee, Ryuji Okazaki, Jozef Masarik, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Kasumi Yogata, Toru Yada, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda, Masanao Abe, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Hirotaka Sawada, Satoshi Tanaka, Tomohiro Usui, Koji Wada, Hajime Yano, Makoto Yoshikawa, Hayabusa2 Initial Analysis Volatile Team   +30 more
wiley   +1 more source

Accretion and Uneven Depletion of the Main Asteroid Belt

The Planetary Science Journal
The main asteroid belt (MAB) is known to be primarily composed of objects from two distinct taxonomic classes, generically defined here as S- and C-complex.
Rogerio Deienno, David Nesvorný, Matthew S. Clement, William F. Bottke, André Izidoro, Kevin J. Walsh   +5 more
doaj   +1 more source

Dynamics of rotationally fissioned asteroids: non-planar case [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
The rotational fission of asteroids has been studied previously with simplified models restricted to planar motion. However, the observed physical configuration of contact binaries leads one to conclude that most of them are not in a planar configuration and hence would not be restricted to planar motion once they undergo rotational fission.
Boldrin, L. A G, Scheeres, D. J., Winter, O. C.   +2 more
openaire   +2 more sources

Petrography and mineral chemistry of Northeast Africa 053—A remnant of Martian crystal mush

Meteoritics &Planetary Science, EarlyView.
Abstract In Earth's igneous systems, crystal mushes, crystal‐rich frameworks permeated by silicate melt, represent a common and fundamental stage in the evolution of magma bodies. However, whether crystal mushes occur within Martian igneous systems and play a comparable role is unknown. Here, we present a comprehensive petrography and mineral chemistry
Xhonatan Shehaj, Eleonora Ammannito, Giovanni Pratesi   +2 more
wiley   +1 more source

The Cumulation of Debris Clouds around a Fast-rotating Asteroid

The Astrophysical Journal
The rotational mass loss has been realized to be a prevalent mechanism to produce low-speed debris near the asteroid, and the size composition of the asteroid’s surface regolith has been closely measured by in situ explorations.
Chenyang Huang, Yang Yu, Zhijun Song, Bin Cheng, Patrick Michel, Hexi Baoyin   +5 more
doaj   +1 more source

Technical Challenges and Ethical, Legal and Social Issues (ELSI) for Asteroid Mining and Planetary Defense

Aerospace
Advances in the field of asteroid dynamics continue to yield new knowledge regarding the behavior and characteristics of asteroids, allowing unprecedented levels of accuracy for predicting trajectories and contributing to impact avoidance strategies ...
Evie Kendal, Tony Milligan, Martin Elvis
doaj   +1 more source

On the dynamics of Trojan asteroids [PDF]

Symposium - International Astronomical Union, 1996
The author's theory of Trojan asteroids (Érdi, 1988) is developed further. The motion of the Trojans is considered in the framework of the three-dimensional elliptic restricted three-body problem of the Sun-Jupiter-asteroid system including also the secular changes of Jupiter's orbital eccentricity and the apsidal motion of Jupiter's elliptic orbit. An
openaire   +1 more source