Number of Near-Earth Objects and Formation of Lunar Craters over the Last Billion Yearsстатья
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Дата последнего поиска статьи во внешних источниках: 28 октября 2020 г.
Местоположение издательства:Road Town, United Kingdom
Первая страница:384
Последняя страница:404
Аннотация:We compare the number of lunar craters larger than 15 km across and younger than 1.1 Ga to the estimates of the number of craters that could have been formed for 1.1 Ga if the number of near-Earth objects and their orbital elements during that time were close to the corresponding current values. The comparison was performed for craters over the entire lunar surface and in the region of the Oceanus Procellarum and maria on the near side of the Moon. In these estimates, we used the values of collision probabilities of near- Earth objects with the Moon and the dependences of the crater diameters on the impactor sizes. According to the estimates made by different authors, the number density of known Copernican craters with diameters D 15 km in mare regions is at least double the corresponding number for the remaining lunar surface.