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Impact of asteroids and meteorites on the lunar surfaceтезисы доклада
- Авторы: Pugacheva S.G., Feoktistova E.A., Shevchenko V.V.
- Сборник: The ninth Moscow Solar System symposium
- Серия: 9MS3
- Тезисы
- Год издания: 2018
- Место издания: ИКИ институт космических исследований РАН Москва
- Первая страница: 1
- Последняя страница: 373
- Аннотация: Simulating Comet Impacts on the Moon by the SOVA algorithm shows that the ice comets lose 95 to 99.9% of the total cometary water during the impact process. Short-periodcometshavespeed 8-10 km per second, with the impact of such low-speed comets, 1% of water remains after evaporation. The low-speed comets accountonly for 1.5% of lunar craters. Unlike ice comets, the water in the asteroids is in a chemically bound state. The water is blocked in the crystal lattice of minerals and will separate out of the composition only when heated up to 300-1200 degrees (depending on type of minerals). At impact speed of 14 kilometers per second and impact angle of about 45 degrees, about half the mass of the asteroid does not even reach the melting point and remains in the solid state. Based on Scientists’ estimates between 2% and 4.5% of lunar craters can contain substantial water reserves in form of hydrated minerals which are sufficiently stable to hold water even in sunlit places.
- Добавил в систему: Пугачева Светлана Георгиевна