R
Rafael Sfair
Researcher at Sao Paulo State University
Publications - 54
Citations - 654
Rafael Sfair is an academic researcher from Sao Paulo State University. The author has contributed to research in topics: Ring (chemistry) & Planet. The author has an hindex of 11, co-authored 45 publications receiving 552 citations.
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Journal ArticleDOI
Stellar occultations enable milliarcsecond astrometry for Trans-Neptunian objects and Centaurs
F. L. Rommel,Felipe Braga-Ribas,Josselin Desmars,Josselin Desmars,Julio Camargo,Jose Luis Ortiz,Bruno Sicardy,R. Vieira-Martins,Marcelo Assafin,Pablo Santos-Sanz,Rene Duffard,Estela Fernández-Valenzuela,J. Lecacheux,B. E. Morgado,G. Benedetti-Rossi,A. R. Gomes-Júnior,C. L. Pereira,D. Herald,W. Hanna,Jonathan Bradshaw,Nicolás Morales,Joseph Brimacombe,A. Burtovoi,A. Burtovoi,T. Carruthers,J. R. de Barros,Michele Fiori,Michele Fiori,A. C. Gilmore,D. Hooper,Kamil Hornoch,C. Jacques,T. Janik,S. Kerr,P. M. Kilmartin,Jan Maarten Winkel,Giampiero Naletto,Giampiero Naletto,Domenico Nardiello,Domenico Nardiello,Valerio Nascimbeni,Valerio Nascimbeni,Jeffrey A. Newman,A. Ossola,András Pál,András Pál,E. Pimentel,P. Pravec,S. Sposetti,A. Stechina,R. Szakats,Y. Ueno,Luca Zampieri,J. Broughton,J. B. Dunham,D. W. Dunham,D. Gault,T. Hayamizu,K. Hosoi,Emmanuel Jehin,Rhian H. Jones,K. Kitazaki,R. Komžík,A. Marciniak,Anaëlle Maury,H. Mikuž,P. Nosworthy,J. Fabrega Polleri,Sohrab Rahvar,Rafael Sfair,P. B. Siqueira,Colin Snodgrass,P. Sogorb,H. Tomioka,J. Tregloan-Reed,Othon C. Winter +75 more
TL;DR: In this article, the authors analyzed data from stellar occultations to obtain astrometric positions of the involved bodies, and derived 37 precise positions for 19 TNOs and 4 Centaurs.
Journal ArticleDOI
The journey of Typhon-Echidna as a binary system through the planetary region
TL;DR: In this paper, the authors focused on the temporal evolution of the Typhon-Echidna binary system through the outer and inner planetary systems, and explored the orbital evolutions of 500 clones of Typhon, recording the close encounters of those clones with planets.
Journal ArticleDOI
First stellar occultation by the Galilean moon Europa and upcoming events between 2019 and 2021
B. E. Morgado,G. Benedetti-Rossi,A. R. Gomes-Júnior,Marcelo Assafin,Valery Lainey,Valery Lainey,R. Vieira-Martins,Julio Camargo,Felipe Braga-Ribas,Felipe Braga-Ribas,R. C. Boufleur,J. Fabrega,D. I. Machado,Alain Maury,L. L. Trabuco,J. R. de Barros,P. Cacella,A. Crispim,C. Jaques,G. Y. Navas,E. Pimentel,F. L. Rommel,T. de Santana,William Schoenell,Rafael Sfair,Othon C. Winter +25 more
TL;DR: In this paper, a stellar occultation by the Galilean moon Europa (J2) was observed and a campaign for observing stellar occultations for all Galilean moons was proposed.
Journal ArticleDOI
Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020
B. E. Morgado,B. E. Morgado,Bruno Sicardy,Felipe Braga-Ribas,Josselin Desmars,Josselin Desmars,Josselin Desmars,A. R. Gomes-Júnior,D. Bérard,Rodrigo Leiva,Rodrigo Leiva,Rodrigo Leiva,Jose Luis Ortiz,R. Vieira-Martins,R. Vieira-Martins,G. Benedetti-Rossi,G. Benedetti-Rossi,Pablo Santos-Sanz,Julio Camargo,Rene Duffard,F. L. Rommel,F. L. Rommel,Marcelo Assafin,R. C. Boufleur,François Colas,M. Kretlow,W. Beisker,Rafael Sfair,Colin Snodgrass,Nicolás Morales,Estela Fernández-Valenzuela,L. S. Amaral,A. Amarante,R. A. Artola,Michael Backes,Michael Backes,K. L. Bath,S. Bouley,Marc W. Buie,P. Cacella,C. Colazo,J. P. Colque,J. L. Dauvergne,Martin Dominik,Marcelo Emilio,Marcelo Emilio,C. Erickson,R. Evans,J. Fabrega-Polleri,D. Garcia-Lambas,B. L. Giacchini,W. Hanna,D. Herald,G. Hesler,Tobias C. Hinse,Tobias C. Hinse,C. Jacques,Emmanuel Jehin,U. G. Jørgensen,S. Kerr,Vladimir Kouprianov,Vladimir Kouprianov,S. E. Levine,S. E. Levine,T. Linder,P. D. Maley,D. I. Machado,L. Maquet,Anaëlle Maury,R. Melia,E. Meza,B. Mondon,T. Moura,Jeffrey A. Newman,T. Payet,C. L. Pereira,C. L. Pereira,Joe Pollock,R. C. Poltronieri,F. Quispe-Huaynasi,Daniel E. Reichart,T. de Santana,T. de Santana,E. M. Schneiter,M. V. Sieyra,Jesper Skottfelt,J. F. Soulier,M. Starck,P. Thierry,Pascal Torres,Pascal Torres,L. L. Trabuco,Eduardo Unda-Sanzana,T. A. R. Yamashita,Othon C. Winter,A. Zapata,C. A. Zuluaga +96 more
TL;DR: The Centaur (10199) Chariklo has the first rings system discovered around a small object and was first observed using stellar occultation in 2013 as discussed by the authors, which allows the determination of sizes and shapes with kilometre accuracy and obtain characteristics of the occulting object and its vicinity.
Journal ArticleDOI
Stability and Evolution of Fallen Particles Around the Surface of Asteroid (101955) Bennu
TL;DR: In this paper, the stability, evolution, and final outcome of the simulated particles around the asteroid Bennu have been analyzed, and the results show that most of the particles larger than a few centimeters fall in the equatorial region close to the Kingfisher area or close to a region diametrically opposite to it.