THE SECOND MOON. BETWEEN ARRIVAL AND FALL: SOME TIME BEFORE "12900" OR HOW GUESTS MAY COME (MOON2)

Guests who came without warning — may come again-2. The present work investigates the dynamic possibility of the following event: the capture by Earth of a cosmic icy body with a mass of the order of 10¹⁸ kg from a near-Earth stream, the subsequent orbital stay of this body on a geocentric orbit for a period of time, and its subsequent fall to Earth 12,900 ± years ago. In effect, this is a continuation of the previous work of Popov (https://zenodo.org/records/22847947); the present work verifies its mechanical realizability and feasibility. It is proved that: the capture of a body of the indicated class is possible; the duration of orbital existence is a spectral quantity (conveyor class 2.7 years, population median about half a year, long-livers up to 56 years); the atmospheric entry velocity is 10.6–11.0 km/s (calculated trajectory: 10.87); the energy parameters of the finale agree with the requirements of the Popov Cascade to an accuracy no worse than one percent. Not one classical result of celestial mechanics is refuted in this: each known prohibition on capture is formulated together with its domain of applicability, and it is shown that the trajectory under consideration lies in the domain of the physically possible. [email protected]