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The 1999 Quadrantids and the lunar Na atmosphere

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Academic year: 2021

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Figure

Table 1. Measurements of the lunar Na atmosphere during the Quadrantids.
Table 3), the impact velocity being one of the greatest: the mean impact velocity of the Leonids (orbiting the Sun in the opposite direction to the Earth and Moon) is 70.7 km s 21 , much higher than that of the Quadrantids (41.0 km s 21 ).

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