The NEO deflection method employing laser ablation is an interesting and promising method to deviate the orbit of the asteroid. This technique employs trains of solar-pumped laser pulses, from a number of spacecrafts in specific formation, to ablate material from the asteroid surface. This process not only reduces the momentum of the asteroid by required amount but also creates a pressure in th...

In-situ observations of minor bodies like asteroids or comets are scientifically very important because their sizes are too small to have high internal pressures and temperatures, which means they should hold the early chemistry of the solar system. In recent years, some rendezvous or sample-return missions to small body have received a lot of attention in the world. To date, the missions of NE...

The gravitational effects of the Sun on a particle orbiting another massive body which itself moves on a circular path around the Sun have been studied extensively. Most recently, D. P. Hamilton and J. A. Burns (1991, Zcarus 92, 118-131) characterized the size and shape of a stability zone around an asteroid on a circular heliocentric orbit within which material could remain bound for an extend...

Asteroid (99942) Apophis' close approach in 2029 will be one of the most significant small-body encounter events in the near future and offers a good opportunity for in situ exploration to determine the asteroid's surface properties and measure any tidal effects that might alter its regolith configuration. Resurfacing mechanics has become a new focus for asteroid researchers due to its importan...

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Composite spectra of different rotational aspects of the S asteroid 433 Eros were assembled from previous studies, covering the wavelength range 0ø33-2.5 grn. These data allow us to measure significant attributes of Eros's spectrum• its mafic mineral absorptions, and the degree and nature of compositional heterogeneity of its surfaceo We also evaluated previous Sasteroid taxonomies using indepe...

Impact-induced seismic vibrations have long been suspected of being an important surface modification process on small satellites and asteroids. In this study, we use a series of linked seismic and geomorphic models to investigate the process in detail. We begin by developing a basic theory for the propagation of seismic energy in a highly fractured asteroid, and we use this theory to model the...

Different fragmentation models are applied to a number of events, including the entry of TC32008 asteroid.

Asteroidal triple free (AT-free) graphs have been introduced as a generalization of interval graphs, since interval graphs are exactly the chordal AT-free graphs. While for interval graphs it is obvious that there is always a linear ordering of the vertices, such that for each triple of independent vertices the middle one intercepts any path between the remaining vertices of the triple, it is n...