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		<doi>10.1007/s40295-017-0120-x</doi>
		<issn>0021-9142</issn>
		<citationkey>PradoGomeChan:2018:Bu“EPo</citationkey>
		<title>Building an “Escape Portal” with tethers fixed in asteroids</title>
		<year>2018</year>
		<month>Sept.</month>
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		<author>Prado, Antonio Fernando Bertachini de Almeida,</author>
		<author>Gomes, Vivian Martins,</author>
		<author>Chanut, Thierry Gregory Gil,</author>
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		<group>DIDMC-CGETE-INPE-MCTIC-GOV-BR</group>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<affiliation>Universidade Estadual Paulista (UNESP)</affiliation>
		<affiliation>Universidade Estadual Paulista (UNESP)</affiliation>
		<electronicmailaddress>antonio.prado@inpe.br</electronicmailaddress>
		<electronicmailaddress>vivianmartinsgomes@gmail.com</electronicmailaddress>
		<electronicmailaddress>chiant69@hotmail.com</electronicmailaddress>
		<journal>The Journal of the Astronautical Sciences</journal>
		<volume>65</volume>
		<number>3</number>
		<pages>355-375</pages>
		<secondarymark>B1_ENGENHARIAS_III B5_ASTRONOMIA_/_FÍSICA</secondarymark>
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		<keywords>Astrodynamics · Orbital maneuvers · Thetered maneuvers · Escape trajectories.</keywords>
		<abstract>The main idea of this paper is to propose the construction of an Escape Portal to send a spacecraft to the exterior planets, or even to make it escape from the Solar System, using a Tethered Sling Shot Maneuver (TSSM) with an asteroid. The construction of this portal allows an unlimited number of maneuvers with the same tether, which is very interesting when considering a possible use for small satellites. This structure would be formed by a tether that remains fixed in an asteroid. At the other end of the tether, a large net is fixed, such that the only action required from the spacecraft to make the TSSM is to hit the net. The net can have a mechanism to open a passage to release the spacecraft when the desired rotation is obtained. This technique would avoid some of the problems that appear when assuming that the spacecraft needs to carry a tether on board that would be released to hit the asteroid just before the maneuver.</abstract>
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