{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T00:58:48Z","timestamp":1760230728287,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2022,8,11]],"date-time":"2022-08-11T00:00:00Z","timestamp":1660176000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"RUDN University Strategic Academic Leadership Program","award":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"],"award-info":[{"award-number":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"]}]},{"DOI":"10.13039\/501100001807","name":"FAPESP proc.","doi-asserted-by":"publisher","award":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"],"award-info":[{"award-number":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"]}],"id":[{"id":"10.13039\/501100001807","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003593","name":"CNPq proc.","doi-asserted-by":"publisher","award":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"],"award-info":[{"award-number":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]},{"name":"CAPES","award":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"],"award-info":[{"award-number":["2016\/024561-0","2018\/17864-1","305210\/2018-1","309089\/2021-2"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>The deflection of potentially dangerous asteroids has been treated with great intensity and has gained more and more attention in scientific research. Different techniques are developed over the years. Among these techniques, we found the kinetic impact deflection technique to be the most viable at the moment. In this work we address the kinetic impact deflection technique, but in a scenario where we have a short time to deflect an asteroid that will collide with Earth. For this, we also use a maneuver similar to a powered gravity-assisted maneuver with Earth in a previous passage to change the trajectory of the asteroid to avoid the collision. We apply this technique in three scenarios: (i) impulse before the close encounter, (ii) impulse during the close encounter, and (iii) impulse after the close encounter. We observe that some trajectories are symmetric with respect to the line Sun\u2013Earth, and others are asymmetric. We show that, using this technique, it is possible to change the trajectory of the asteroid, even in a short period, to avoid the collision without using a large variation of velocity in the orbit of the asteroid.<\/jats:p>","DOI":"10.3390\/sym14081658","type":"journal-article","created":{"date-parts":[[2022,8,11]],"date-time":"2022-08-11T23:05:49Z","timestamp":1660259149000},"page":"1658","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Deflecting an Asteroid on a Collision Course with Earth Using a Powered Swing-By Maneuver"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5960-6512","authenticated-orcid":false,"given":"Bruno S.","family":"Chagas","sequence":"first","affiliation":[{"name":"Grupo de Din\u00e2mica Orbital e Planetologia, S\u00e3o Paulo State University (UNESP), Guaratinguet\u00e1 12516-410, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7966-3231","authenticated-orcid":false,"given":"Antonio Fernando Bertachini de Almeida","family":"Prado","sequence":"additional","affiliation":[{"name":"Academy Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, 117198 Moscow, Russia"},{"name":"Postgraduate Division, National Institute for Space Research (INPE), S\u00e3o Jos\u00e9 dos Campos 12227-010, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4901-3289","authenticated-orcid":false,"given":"Othon Cabo","family":"Winter","sequence":"additional","affiliation":[{"name":"Grupo de Din\u00e2mica Orbital e Planetologia, S\u00e3o Paulo State University (UNESP), Guaratinguet\u00e1 12516-410, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"429","DOI":"10.1038\/360429a0","article-title":"Deflection and fragmentation of near-Earth asteroids","volume":"360","author":"Ahrens","year":"1992","journal-title":"Nature"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.actaastro.2015.05.021","article-title":"Asteroid impact and deflection assessment mission","volume":"115","author":"Cheng","year":"2015","journal-title":"Acta Astronaut."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1007\/s11038-005-6834-y","article-title":"Early neo deflections: A viable, lower-energy option","volume":"96","author":"Carusi","year":"2005","journal-title":"Earth Moon Planets"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"185","DOI":"10.1016\/S0094-5765(01)00176-X","article-title":"Planetary defense from the nearest 4 lagrangian points plus rfi-free radioastronomy from the farside of the moon: A unified vision","volume":"50","author":"Maccone","year":"2002","journal-title":"Acta Astronaut."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"459","DOI":"10.1134\/S001095251005014X","article-title":"A method of controlling asteroid collision with the Earth","volume":"48","author":"Gonzaga","year":"2010","journal-title":"Cosm. 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