Results 51 to 60 of about 440 (144)

The Potential Danger to Satellites due to Ejecta from a 2032 Lunar Impact by Asteroid 2024 YR4

The Astrophysical Journal Letters
On 2032 December 22, the 60 m diameter asteroid 2024 YR _4 has a 4% chance of impacting the Moon. Such an impact would release 6.5 MT TNT equivalent energy and produce a ∼1 km diameter crater.
Paul Wiegert, Peter Brown, Jack Lopes, Martin Connors   +3 more
doaj   +1 more source

Challenge in Arrokoth’s Single Merger to Achieve the Shape’s Principal Axis Configuration

The Planetary Science Journal
The cold-classical Kuiper Belt Object 486958 Arrokoth is a contact binary composed of two flattened lobes, Weeyo and Wenu, closely aligned along their principal axes, despite each lobe having a highly irregular shape.
Ketan Kamat, Ryota Nakano, Masatoshi Hirabayashi   +2 more
doaj   +1 more source

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

An ambitious new mission seeks the origin of the moons of Mars. [PDF]

Proc Natl Acad Sci U S A, 2023
Croswell K.
europepmc   +1 more source

Asteroid Impact Satellite Optimization

This paper proposes an optimization algorithm inspired by the physical phenomenon of asteroid impacts on satellites, called the Asteroid Impact Satellite Optimization (AISO). This algorithm simulates the dynamics of asteroid impacts on satellites and incorporates three innovative mechanisms: multi-impact coordination, fragment self-organization, and ...
openaire   +1 more source

Combined optical line-of-sight and crosslink radiometric navigation for distributed deep-space systems. [PDF]

Sci Rep, 2023
Casini S, Turan E, Cervone A, Monna B, Visser P.   +4 more
europepmc   +1 more source

Physical and Mutual Orbit Characteristics of Near-Earth Binary Asteroid (163693) Atira

The Planetary Science Journal
We report physical and mutual orbit characteristics of near-Earth binary asteroid (163693) Atira. Using S -band (2380 MHz, 12.6 cm) radar observations from the Arecibo Observatory and several epochs of lightcurve observations from 2003 to 2019 with SHAPE
Aaron P. Deleon, Sean E. Marshall, Tracy M. Becker, Petr Pravec, Ellen S. Howell, Michael C. Nolan, Anne K. Virkki, Edgard G. Rivera-Valentín, Patrick A. Taylor, Bryce T. Bolin, Beth Aponte-Hernández, Israel Cabrera, Peter Kušnirák, Kamil Hornoch, Hana Kučáková   +14 more
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Origin of asteroid (469219) Kamo‘oalewa: The main asteroid belt or the Giordano Bruno crater on the Moon?

Astronomy & Astrophysics
Context. Asteroid (469219) Kamo‘oalewa is the target of the Tianwen-2 sample-return mission by the China National Space Administration. Because of its orbit and its peculiar spectral properties, it was proposed that Kamo‘oalewa originated from the Moon ...
Fenucci Marco, Novaković Bojan, Granvik Mikael, Zhang Pengfei   +3 more
doaj   +1 more source

Numerical Determination of the Gravitational Cross Sections of an Accreting Binary

The Astrophysical Journal
A significant amount of work has been devoted to the study of small binary solar system objects. The majority of these binaries, especially among the near-Earth or main belt asteroids, have small radius ratios, implying a large difference in size between
Zachary Murray
doaj   +1 more source

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.
openaire   +1 more source