{"id":34448,"date":"2023-10-27T11:16:18","date_gmt":"2023-10-27T09:16:18","guid":{"rendered":"https:\/\/karmaka.de\/?p=34448"},"modified":"2023-10-27T11:23:30","modified_gmt":"2023-10-27T09:23:30","slug":"oort-cloud-perturbations-as-a-source-of-hyperbolic-earth-impactors","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=34448","title":{"rendered":"Oort cloud perturbations as a source of hyperbolic Earth impactors<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>Eloy Pe\u00f1a-Asensio, Jaakko Visuri, Josep M. Trigo-Rodr\u00edguez, Hector Socas-Navarro, Maria Gritsevich, Markku Siljama, Albert Rimola<\/p>\n\n\n\n<p>Icarus<br>Available online 26 October 2023, 115844<\/p>\n\n\n\n<p><a rel=\"noreferrer noopener\" href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0019103523004232\" target=\"_blank\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p>&#8220;Highlights<\/p>\n\n\n\n<ul><li>Analyzed FH1, the first hyperbolic meteor detected by the Finnish Fireball Network.<\/li><li>FH1 was a fast, height grazing meteor with an almost ecliptic orbit.<\/li><li>Considered FH1 as possibly interstellar or a centimeter asteroid-like body from the Oort cloud.<\/li><li>CNEOS hyperbolic fireballs are statistically unlikely to be of interstellar origin.<\/li><li>FH1 and the so-called IM2 may be consistent with having undergone gravitational perturbation during Scholz\u2019s passage.&#8221;<\/li><\/ul>\n\n\n\n<p class=\"justify-text\">&#8220;The observation of interstellar objects 1I\/\u2019Oumuamua and 2I\/Borisov suggests the existence of a larger population of smaller projectiles that impact our planet with unbound orbits. We analyze an asteroidal grazing meteor (FH1) recorded by the Finnish Fireball Network on October 23, 2022. FH1 displayed a likely hyperbolic orbit lying on the ecliptic plane with an estimated velocity excess of 0.7 km s\u22121 at impact. FH1 may either be an interstellar object, indicating a high-strength bias in this population, or an Oort cloud object, which would reinforce migration-based solar system models. Furthermore, under the calculated uncertainties, FH1 could potentially be associated with the passage of Scholz\u2019s binary star system. Statistical evaluation of uncertainties in the CNEOS database and study of its hyperbolic fireballs reveals an anisotropic geocentric radiant distribution and low orbital inclinations, challenging the assumption of a randomly incoming interstellar population. Orbital integrations suggest that the event on March 9, 2017 (IM2) from CNEOS may have experienced gravitational perturbation during the Scholz fly-by, contingent upon velocity overestimation within the expected range. These findings suggest that apparent interstellar meteors may, in fact, be the result of accelerated meteoroid impacts caused by close encounters with massive objects within or passing through our solar system.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Eloy Pe\u00f1a-Asensio, Jaakko Visuri, Josep M. Trigo-Rodr\u00edguez, Hector Socas-Navarro, Maria Gritsevich, Markku Siljama, Albert Rimola IcarusAvailable online 26 October 2023, 115844 LINK (OPEN ACCESS) &#8220;Highlights Analyzed FH1, the first hyperbolic meteor detected by the Finnish&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[6032,5942,221,2888,5651,98,141,1879],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34448"}],"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=34448"}],"version-history":[{"count":2,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34448\/revisions"}],"predecessor-version":[{"id":34450,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/34448\/revisions\/34450"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=34448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=34448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=34448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}