26 citations · 39 across the 2 of their papers we have counts for
6 papers
Astrometry of the main satellites of Uranus: 18 years of observations
J. I. B. Camargo, F. P. Magalhães, R. Vieira-Martins +7
We determine accurate positions of the main satellites of Uranus: Miranda, Ariel, Umbriel, Titania, and Oberon. Positions of Uranus, as derived from those of these satellites, are…
Astrometric positions for 18 irregular satellites of giant planets from 23 years of observations
A. R. Gomes-Júnior, M. Assafin, R. Vieira-Martins +12
The irregular satellites of the giant planets are believed to have been captured during the evolution of the solar system. Knowing their physical parameters, such as size, density,…
Candidate stellar occultations by large trans-neptunian objects up to 2015
M. Assafin, J. I. B. Camargo, R. Vieira Martins +4
We study large trans-neptunian objects (TNOs) using stellar occultations. We derive precise astrometric predictions for stellar occultations by Eris, Haumea, Ixion, Makemake, Orcus…
On the influence of radio extended structures on offsets between the optical and VLBI positions of sources in the ICRF2
J. I. B. Camargo, A. H. Andrei, M. Assafin +2
Context: To investigate the differences between positions, as determined by optical (direct imaging) and Very Long Baseline Interferometry (VLBI) techniques, of extragalactic sourc…
Parallaxes of Southern Extremely Cool objects - I: Targets, Proper motions and first results
Alexandre H. Andrei, Richard L. Smart, Jucira L. Penna +11
We present results from the PARallaxes of Southern Extremely Cool objects (PARSEC) program, an observational program begun in April 2007 to determine parallaxes for 122 L and 28 T…
The Large Quasar Reference Frame (LQRF) - an optical representation of the ICRS
A. H. Andrei, J. Souchay, N. Zacharias +9
The large number and all-sky distribution of quasars from different surveys, along with their presence in large, deep astrometric catalogs,enables the building of an optical materi…