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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

APPROX - mutual approximations between the Galilean moons: the 2016-2018 observational campaign

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Autor(es):
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Morgado, B. [1, 2] ; Vieira-Martins, R. [1, 3, 2] ; Assafin, M. [1, 3] ; Machado, D. I. [4, 5] ; Camargo, J. I. B. [1, 2] ; Sfair, R. [6] ; Malacarne, M. [7] ; Braga-Ribas, F. [1, 2, 8] ; Robert, V. [9, 10] ; Bassallo, T. [2] ; Benedetti-Rossi, G. [1, 2] ; Boldrin, L. A. [6] ; Borderes-Motta, G. [6] ; Camargo, B. C. B. [6] ; Crispim, A. [8] ; Dias-Oliveira, A. [2, 11] ; Gomes-Junior, A. R. [1, 3, 6] ; Lainey, V. [12, 9] ; Miranda, J. O. [7] ; Moura, T. S. [6] ; Ribeiro, F. K. [7] ; de Santana, T. [6] ; Santos-Filho, S. [1] ; Trabuco, L. L. [5] ; Winter, O. C. [6] ; Yamashita, T. A. R. [6]
Número total de Autores: 26
Afiliação do(s) autor(es):
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[1] Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil
[2] Observ Nacl MCTIC, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil
[3] Univ Fed Rio de Janeiro, Observ Valongo, Ladeira Pedro Antonio 43, BR-20080090 Rio De Janeiro, RJ - Brazil
[4] Univ Estadual Oeste Parana Unioeste, Ave Tarquinio Joslin Santos 1300, BR-85870650 Foz Do Iguacu, PR - Brazil
[5] Polo Astron Casimiro Montenegro Filho FPTI BR, Ave Tancredo Neves 6731, BR-85867900 Foz Do Iguacu, PR - Brazil
[6] UNESP Sao Paulo State Univ, Grp Dinam Orbital & Planetol, BR-12516410 Guaratingueta, SP - Brazil
[7] Univ Fed Espirito Santo, Av Fernando Ferrari 514, BR-29075910 Vitoria, ES - Brazil
[8] Fed Univ Technol Parana UTFPR DAFIS, Av Sete Setembro 3165, BR-80230901 Curitiba, PR - Brazil
[9] Univ Lille 1, UPMC, Sorbonne Univ, IMCCE, Observ Paris, PSL Res Univ, CNRS, UMR 8028, 77 Av Denfert Rochereau, F-75014 Paris - France
[10] IPSA, 63 Bis Blvd Brandebourg, F-94200 Ivry - France
[11] Escola SESC Ensino Medio, Ave Ayrton Senna 5677, BR-22775004 Rio De Janeiro, RJ - Brazil
[12] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 - USA
Número total de Afiliações: 12
Tipo de documento: Artigo Científico
Fonte: Monthly Notices of the Royal Astronomical Society; v. 482, n. 4, p. 5190-5200, FEB 2019.
Citações Web of Science: 6
Resumo

The technique of mutual approximations accurately gives the central instant of the maximum apparent approximation of two moving natural satellites in the plane of the sky. This can be used in ephemeris fitting to infer the relative positions of satellites with high precision. Only mutual phenomena - occultations and eclipses - can achieve better results. However, mutual phenomena only occur every six years in the case of Jupiter. Mutual approximations do not have this restriction and can be observed at any time in the year as long as the satellites are visible. In this work, we present 104 central instants determined from the observations of 66 mutual approximations between the Galilean moons carried out at different sites in Brazil and France during the period 2016-2018. For 28 events, we have at least two independent observations. All telescopes were equipped with a narrow-band filter centred at 889 nm with a width of 15 nm to eliminate the scattered light from Jupiter. The telescope apertures ranged between 25 and 120 cm. For comparison, the precision of the positions obtained with classical CCD astrometry is about 100 mas, for mutual phenomena it can be 10 mas or less, and the average internal precision obtained with mutual approximations is 11.3 mas. This new type of simple, yet accurate, observations can significantly improve the orbits and ephemeris of Galilean satellites and thus it can be very useful for the planning of future space missions to the Jovian system. (AU)

Processo FAPESP: 16/24561-0 - A relevância dos pequenos corpos em dinâmica orbital
Beneficiário:Othon Cabo Winter
Linha de fomento: Auxílio à Pesquisa - Temático