Results 241 to 250 of about 821,143 (284)

On the fragmentation of asteroids and planetary satellites

Icarus, 1990
A general scaling model is defined which allows the extrapolation of small-scale collisional fragmentation experiment results, and existing collisional theories are considered within its framework. Scaling based exclusively upon the specific energy, Q, of the event (the ratio of projectile kinetic energy to the mass of the target body) is shown to hold
Kevin R. Housen, Keith A. Holsapple
openaire   +1 more source

Near-Earth Asteroid Characterization and Observation (NEACO) Mission to Asteroid (469219) 2016 HO3

Journal of Spacecraft and Rockets, 2019
The Near-Earth Asteroid Characterization and Observation (NEACO) mission is a concept study proposing to explore the fast-rotating asteroid (469219) 2016 HO3, one of Earth’s few quasi-satellites.
Chandrakanth Venigalla, N. Baresi, Jonathan D. Aziz, Benjamin Bercovici, D. Brack, A. Dahir, S. Smet, J. Fulton, Marielle Pellegrino, S. V. Wal   +9 more
semanticscholar   +1 more source

The stable region of satellites of large asteroids

Icarus, 1988
Abstract Numerical experiments show that retrograde satellites can exist almost twice as far from a minor planet as direct satellites in the elliptic restricted four-body problem. The orbital eccentricity of the minor planet decreases the stable region of its satellite.
S.-P. Zhang, K.A. Innanen
openaire   +1 more source

Frequencies of Occultations of Stars by Planets, Satellites, and Asteroids

Science, 1972
Calculations show that several occultations of stars by the large satellites of the outer planets, Pluto, and the large asteroids could be observed each decade with existing equipment at Earth-based telescopes. A systematic program of occultation predictions and observations is urged in order to improve our knowledge about the atmospheres, sizes ...
openaire   +2 more sources

Shapes and gravitational moments of satellites and asteroids

Icarus, 1979
Abstract The shapes and gravitational moments of tidally and rotationally distorted satellites with nonuniform internal density distributions are calculated. Spacecraft determinations of the radii and (a) the gravitational moments of some satellites of Jupiter and Saturn, particularly Io, Ganymede and Titan or (b) the shapes of some others ...
openaire   +1 more source

Asteroids with satellites: Analysis of observational data

Solar System Research, 2013
The volume of observational information on asteroids and trans-Neptunians with satellites has significantly increased in recent years. In this paper we study the dependence of asteroid duplicity on the main physical parameters of the primary: the size and rotation rate.
N. M. Gaftonyuk, N. N. Gorkavyi
openaire   +1 more source

Topography on satellite surfaces and the shape of asteroids

Icarus, 1973
Consideration of the topography and shape of incompressible, nonrotating, isothermal, spherical objects as an approach to the study of the topography and shape of smaller planetary bodies. A static model and a creep deformation model are applied in the process.
T.V. Johnson, T.R. McGetchin
openaire   +1 more source

Structural integrity of rubble asteroidal satellites

Icarus, 2019
Abstract We investigate the structural integrity of asynchronous, rubble asteroidal satellites, which may or may not be in synchronous motion, by identifying necessary conditions for the structural equilibrium of such objects. Asynchronous motion may occur when the satellite’s rotation rate about its mass center does not match its orbital angular ...
openaire   +1 more source

The Formation of Asteroidal Satellites in Catastrophic Collisions

Icarus, 1996
Abstract Numerical simulations of the initial stages of the expanding debris field resulting from the disruption of a parent asteroid show that the formation of co-orbiting fragments and even contact binaries is a natural outcome of catastrophic collisions between asteroids.
openaire   +1 more source

Asteroids' satellites in Gaia astrometric data

It is known to the astronomical community that asteroids with satellites are not uncommon in the Solar System. So far we have more than 500 documented asteroid systems encompassing binaries, pairs and multiples[1]. Yet, amidst this group of objects, several others remain enigmatic due to the challenges in observation and detection with conventional ...
Luana Liberato, Paolo Tanga, David Mary
openaire   +1 more source