  Possible connections between the physical properties of Near-Earth Asteroids
(NEA) and their orbital evolution were explored, with emphasis on binary
asteroids. Our main starting hypothesis, suggested from the observations, was
that the NEA population contains considerably higher percent of binaries
compared to the Main Belt. The simulation covered simultaneously both orbital
evolution and evolution of physical properties, which is the main improvement
in comparison to the previous researches of this kind. Physical evolution due
to tidal forces and collision/disruption events was described with TREESPH
hydrocode. The results show typical evolution paths of some types of NEA:
asteroids with a satellite, synchronized binaries, single fast rotators, double
asteroids. The two latter types and their physical properties match closely to
some observed NEA, while the two former ones have not been detected in
observational practice. We conjecture that this is partly due to selection
effects of current observational techniques but partly also because some of
them are likely to evolve into different types of objects (e. g. single slow
rotators) through the processes we have not taken into account in our
simulation. The total percentage of binaries among NEA can be estimated to 12%.
We have to notice, however, that more detailed simulations, performed for
longer time spans, are needed to confirm our results.
