Interplanetary objects in review: Statistics of their masses and dynamics

摘要: Abstract Present knowledge on the spatial distribution of masses interplanetary bodies and their current evolution is reviewed. The following list problems progress solution are discussed in this review. First, from most reliable data, a best estimate objects, including meteoroids, asteroids, comets, derived some uncertainties discussed. Owing to observational selection effects insufficient information physical properties observed it difficult number density these objects much more accurately than within about an order magnitude. Following influence collisions population Catastrophic play major role stray objects; erosive appears minor. gravitational perturbations motion then reviewed: because random will diffuse throughout solar system eventually be either expelled or destroyed by collisions. distributions radiation ages chondritic meteorites consistent with such model. Finally, forces micrometeoroids discussed; shown that flattening curve for meteoroids micrometeoroid range probably due effects.