Secondary crater distribution and ejecta profile of Tycho crater

Abstract

The size-range distribution of secondary craters around a lunar crater Tycho was measured. Tycho is known as a typical crater formed by an oblique impact. Both at the downrange and at the uprange of the oblique impact, the size distributions of the ejecta fragments of Tycho estimated from the size and range of the secondary craters are identical. The fragment size distributions also seem to be independent of the ejection velocity. The density profiles with range from the primary crater are different between at the downrange and the uprange.