Abstract
The main physical processes during the entry of natural 0.01-to 100-m large cosmic bodies into planetary atmospheres are fragmentation and evaporation. The relative role of evaporation can be characterized by the mass-loss parameter, which is proportional to the ratio of the kinetic energy per unit mass of the body to the effective enthalpy of evaporation. Examples of actual large fireballs are given for various values of this parameter. The proposed general approach helps in understanding the extensive observational data of various level of reliability and also makes it possible to preliminarily separate real hypotheses from unrealistic ones.
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