Results 171 to 180 of about 726,529 (200)

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   +2 more sources

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.
Kimmo Innanen, S.-P. Zhang
openaire   +2 more sources

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

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   +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   +2 more sources

Ballistic and Design of Nano-Class Spacecraft for Asteroid Exploration

International Conference on Recent Advances in Space Technologies, 2019
In this paper we consider objects with a nonspherical gravity field and small gravitational pull, for example, asteroids, planet's satellites, and comets.
E. Nikolaeva, O. Starinova, A. Shornikov, Y. S. Kiunov, I. Chernyakina   +4 more
semanticscholar   +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   +3 more sources

A method for capturing asteroids into earth satellite orbits

Astronomy Letters, 2015
At present, the capture of a suitable asteroid into an Earth satellite orbit is proposed as one of the methods for investigating asteroids within the framework of manned missions. Once the asteroid has been transferred to such an orbit, an expedition with the participation of astronauts is planned to the asteroid surface, where research is carried out ...
N. Eismont, Anton Ledkov, R. R. Nazirov, Michael Boyarsky   +3 more
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Fragmentation of asteroids and artificial satellites in orbit

Icarus, 1978
Abstract In this paper we develop expressions for the probability density in the orbital elements resulting from a spherical explosion in orbit. The usual power law mass distribution is employed, and it is assumed that equipartition holds among velocity dispersions and masses. The asteroid families Themis, Eos, and Coronis (at least) show an envelope
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Gravitational Deformation in Shaping Asteroids and Small Satellites

Icarus, 1997
Abstract A variety of techniques have demonstrated that some of the solid bodies of the Solar System have distinct irregular shapes, while the rest have sphere-like equilibrium shapes; a sharp transition exists between the two. Such an abrupt, mass-dependent transition may be explained by the yield strength of material at low temperatures ...
S. A. Voropaev, Evgeniy N. Slyuta
openaire   +2 more sources