%0 Journal Article %@resumeid %@resumeid 8JMKD3MGP5W/3C9JGJA %X Several new applications of space tethers to maneuver spacecrafts have been suggested recently. Some of them are combinations with the sling shot effect used in several interplanetary missions. In one type of this family of applications, the tether is attached to an asteroid to make a rotation of the spacecraft, so giving energy to send it to the exterior planets of the Solar System or beyond. A similar idea is to make the capture of spacecrafts by a planet of the Solar System using tethers fixed on their moons. In both of these proposals, the tether is carried on-board the spacecraft and anchored to the celestial body during the approach phase. Another possibility is to build an "Escape Portal" using a tether permanently fixed in an asteroid to give energy to spacecrafts to go to the outer planets. The present paper explores in more detail a combination of those two proposals to build a "Capture Portal" for the planets. The main idea is to build a permanent structure fixed on one of the moons of a given planet, so that it can be used for an unlimited number of maneuvers. With this goal, this research searches for equilibrium points that can be used to place the above structures. The type of force in the tether and the stability of the points are also considered. The results shown here can give some insights in the problems that appear when building such Capture Portal. %9 conference paper %T Using tethers to build a “capture portal” for the planets %@electronicmailaddress %@electronicmailaddress antonio.prado@inpe.br %@nexthigherunit 8JMKD3MGPCW/3F2UALS %@nexthigherunit 8JMKD3MGPCW/446AF4B %@secondarytype PRE PI %@usergroup self-uploading-INPE-MCTI-GOV-BR %@usergroup simone %@group CMC-ETES-SESPG-INPE-MCTIC-GOV-BR %@group DIDMC-CGETE-INPE-MCTIC-GOV-BR %@tertiarymark 8JMKD3MGP3W34P/3NATKT2 %@issn 0065-3438. %2 sid.inpe.br/mtc-m21c/2018/08.06.14.03.25 %@affiliation Instituto Nacional de Pesquisas Espaciais (INPE) %@affiliation Instituto Nacional de Pesquisas Espaciais (INPE) %@affiliation Universidade da Beira Interior %@affiliation Universidade Estadual Paulista (UNESP) %@affiliation National Research University, Higher School of Economics, Moscow, Russian Federation %@affiliation Universidade Estadual Paulista (UNESP) %B Advances in the Astronautical Sciences %@versiontype publisher %P 3839-3858 %4 sid.inpe.br/mtc-m21c/2018/08.06.14.03 %@documentstage not transferred %D 2018 %V 162 %O AAS/AIAA Astrodynamics Specialist Conference, 2017; Stevenson; United States; 20 August 2017 through 24 August 2017 %A Ferreira, Alessandra Ferraz da Silva, %A Prado, Antonio Fernando Bertachini de Almeida, %A Guerman, A. D., %A Santo, D. P. S., %A Burov, A., %A Winter, O. C., %@dissemination WEBSCI; PORTALCAPES; MGA; COMPENDEX. %@area ETES %@holdercode {isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S} %3 AAS 17-680.pdf