Mapping the density of particles over the surface of asteroid (101955) Bennu
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://hdl.handle.net/11449/232781 |
Resumo: | In the present work we study the motion of particles near the surface of Bennu. An application of the results is to give assistance for the selection of the sample site. Considering the gravitational potential given by the polyhedral model of Bennu (1348 vertices, 2692 faces), we numerically simulated many samples of several thousand test particles initially located randomly in a cloud around the asteroid. We have investigated eccentric and inclined orbits, and we also adopted different particle sizes, from dust grains up to small particles. It is already known that Bennu has eight equilibrium points around it, and according to the adopted density, a couple of them might be stable. The influence of the equilibrium points is very strong on the orbital evolution of the particles. In the long term dynamics most of the particles collided with the asteroid surface. From our results were generated map diagrams indicating the amount of collided particles distributed over the surface of Bennu. They show the spots of very high collision rates, where are expected to be fully covered of particles, and also those where it is expected to be cleaner (sites of very low collision rates). These diagrams are made for a range of different particle sizes and also, with and without taking into account the solar radiation pressure in the dynamics of the orbital evolution. In order to make the selection for the sample site, we believe that these results might be extremely useful for the OSIRIS-REX mission. |
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Mapping the density of particles over the surface of asteroid (101955) BennuAsteroid (101955) BennuAsteroid surfaceEquilibrium pointsOSIRIS-REXIn the present work we study the motion of particles near the surface of Bennu. An application of the results is to give assistance for the selection of the sample site. Considering the gravitational potential given by the polyhedral model of Bennu (1348 vertices, 2692 faces), we numerically simulated many samples of several thousand test particles initially located randomly in a cloud around the asteroid. We have investigated eccentric and inclined orbits, and we also adopted different particle sizes, from dust grains up to small particles. It is already known that Bennu has eight equilibrium points around it, and according to the adopted density, a couple of them might be stable. The influence of the equilibrium points is very strong on the orbital evolution of the particles. In the long term dynamics most of the particles collided with the asteroid surface. From our results were generated map diagrams indicating the amount of collided particles distributed over the surface of Bennu. They show the spots of very high collision rates, where are expected to be fully covered of particles, and also those where it is expected to be cleaner (sites of very low collision rates). These diagrams are made for a range of different particle sizes and also, with and without taking into account the solar radiation pressure in the dynamics of the orbital evolution. In order to make the selection for the sample site, we believe that these results might be extremely useful for the OSIRIS-REX mission.Grupo de Dinâmica Orbital and Planetologia São Paulo State University, Av. Ariberto Pereira da Cunha, 333Grupo de Dinâmica Orbital and Planetologia São Paulo State University, Av. Ariberto Pereira da Cunha, 333Universidade Estadual Paulista (UNESP)Winter, Othon C. [UNESP]Amarante, André [UNESP]2022-04-30T11:13:04Z2022-04-30T11:13:04Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject7489-7491Proceedings of the International Astronautical Congress, IAC, v. 11, p. 7489-7491.0074-1795http://hdl.handle.net/11449/2327812-s2.0-85051437961Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProceedings of the International Astronautical Congress, IACinfo:eu-repo/semantics/openAccess2022-04-30T11:13:04Zoai:repositorio.unesp.br:11449/232781Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-30T11:13:04Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
title |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
spellingShingle |
Mapping the density of particles over the surface of asteroid (101955) Bennu Winter, Othon C. [UNESP] Asteroid (101955) Bennu Asteroid surface Equilibrium points OSIRIS-REX |
title_short |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
title_full |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
title_fullStr |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
title_full_unstemmed |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
title_sort |
Mapping the density of particles over the surface of asteroid (101955) Bennu |
author |
Winter, Othon C. [UNESP] |
author_facet |
Winter, Othon C. [UNESP] Amarante, André [UNESP] |
author_role |
author |
author2 |
Amarante, André [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Winter, Othon C. [UNESP] Amarante, André [UNESP] |
dc.subject.por.fl_str_mv |
Asteroid (101955) Bennu Asteroid surface Equilibrium points OSIRIS-REX |
topic |
Asteroid (101955) Bennu Asteroid surface Equilibrium points OSIRIS-REX |
description |
In the present work we study the motion of particles near the surface of Bennu. An application of the results is to give assistance for the selection of the sample site. Considering the gravitational potential given by the polyhedral model of Bennu (1348 vertices, 2692 faces), we numerically simulated many samples of several thousand test particles initially located randomly in a cloud around the asteroid. We have investigated eccentric and inclined orbits, and we also adopted different particle sizes, from dust grains up to small particles. It is already known that Bennu has eight equilibrium points around it, and according to the adopted density, a couple of them might be stable. The influence of the equilibrium points is very strong on the orbital evolution of the particles. In the long term dynamics most of the particles collided with the asteroid surface. From our results were generated map diagrams indicating the amount of collided particles distributed over the surface of Bennu. They show the spots of very high collision rates, where are expected to be fully covered of particles, and also those where it is expected to be cleaner (sites of very low collision rates). These diagrams are made for a range of different particle sizes and also, with and without taking into account the solar radiation pressure in the dynamics of the orbital evolution. In order to make the selection for the sample site, we believe that these results might be extremely useful for the OSIRIS-REX mission. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 2022-04-30T11:13:04Z 2022-04-30T11:13:04Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Proceedings of the International Astronautical Congress, IAC, v. 11, p. 7489-7491. 0074-1795 http://hdl.handle.net/11449/232781 2-s2.0-85051437961 |
identifier_str_mv |
Proceedings of the International Astronautical Congress, IAC, v. 11, p. 7489-7491. 0074-1795 2-s2.0-85051437961 |
url |
http://hdl.handle.net/11449/232781 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Proceedings of the International Astronautical Congress, IAC |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7489-7491 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964578459680768 |