{"id":8945,"date":"2016-06-14T16:43:51","date_gmt":"2016-06-14T14:43:51","guid":{"rendered":"http:\/\/karmaka.de\/?p=8945"},"modified":"2016-06-14T16:43:51","modified_gmt":"2016-06-14T14:43:51","slug":"on-the-nature-of-the-impactor-that-formed-the-shackleton-crater-on-the-moon","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=8945","title":{"rendered":"On the Nature of the Impactor That Formed the Shackleton Crater on the Moon"},"content":{"rendered":"<p>Svetlana G. Pugacheva, Ekaterina A. Feoktistova<\/p>\n<p>Earth, Moon, and Planets<br \/>\npp 1-24, 10.1007\/s11038-016-9489-y<br \/>\nFirst online: 14 June 2016<\/p>\n<p><a href=\"http:\/\/link.springer.com\/article\/10.1007\/s11038-016-9489-y\" target=\"_blank\"><strong>LINK<\/strong><\/a><\/p>\n<p>&#8220;The present paper attempts to assess the characteristics of the impactor that formed the Shackleton crater, located at the south pole of the Moon. The crater\u2019s morphometric parameters were analyzed based on the data of the Lunar Orbiter Laser Altimeter aboard the Lunar Reconnaissance Orbiter. Conclusions were drawn regarding the possible range of the impact angle and the parameters of the transient crater, such as depth and volume. The thickness of ejecta deposits on the transient crater rim and the volume of these deposits at a certain distance from the crater rim were assessed. These assessments enabled determining the type and characteristics of impactors (velocity, density, size, and impact angle) that could have formed the Shackleton crater. It was shown that the Shackleton crater could have been formed by an impact of a low-velocity (3 km\/s) comets with diameter 4\u20134.5 km, chondrite or achondrite with a diameter of 2 km at a 45\u00b0\u201350\u00b0 angle, whose velocity did not exceed 6 km\/s, as well as stony\u2013iron or iron\u2013nickel impactors with a 1\u20132 km diameter for stony\u2013iron asteroids and 1\u20131.5 km for iron\u2013nickel asteroids. The impact velocity of stony\u2013iron impactors, according to the authors\u2019 calculations, can reach 12 km\/s. The impact velocities of iron\u2013nickel asteroids range from 6 to 9 km\/s. The impactor\u2019s substance mass that could have remained in the crater after it was formed was assessed.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Svetlana G. Pugacheva, Ekaterina A. Feoktistova Earth, Moon, and Planets pp 1-24, 10.1007\/s11038-016-9489-y First online: 14 June 2016 LINK &#8220;The present paper attempts to assess the characteristics of the impactor that formed the Shackleton crater,&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90,115],"tags":[95,313,2888,1857,2889],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/8945"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8945"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/8945\/revisions"}],"predecessor-version":[{"id":8947,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/8945\/revisions\/8947"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8945"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8945"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8945"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}