The orbital distribution of Jupiter-family comets and asteroids in near-Earth space

We analyze the orbital distribution of objects captured to near-Earth space from the flux of comets coming from the outer Solar system. For this purpose, we use the model of the cometary cloud developed earlier. This model is consistent with dynamical characteristics of observed near-parabolic comets, short-period comets, Centaurs and high-eccentricity trans-Neptunian objects. We show that the observed distribution of near-Earth asteroids moving in cometary orbits is different from both the modelled distribution formed dynamically by the action of planetary perturbations and the observed distribution of Jupiter-family comets. In particular, while the distributions of arguments of perihelion for observed Jupiter-family comets and modelled cometary objects follow a sinusoidal law with pronounced maxima around 0 and 180 degrees, it is not the case for the distribution of observed cometary asteroids.