The stellar occultation technique provides competitive accuracy in determining the sizes,
shapes, astrometry, etc., of the occulting body, comparable to in-situ observations by …

PRAIA–Package for the Reduction of Astronomical Images Automatically–is a suite of
astrometric and photometric tasks designed to cope with huge amounts of heterogeneous …

A stellar occultation occurs when a Solar System object passes in front of a star for an
observer. This technique allows the sizes and shapes of the occulting body to be determined …

Context. Bright stellar positions are now known with an uncertainty below 1 mas thanks to
Gaia DR2. Between 2019–2020, the Galactic plane will be the background of Jupiter. The …

Doing high-precision astrometry on Uranus' moons is currently quite challenging. No probes
will orbit the system before 2040. New high-precision mutual phenomena measurements …

Abstract Trans-Neptunian objects (TNOs) are a source of invaluable information to access
the history and evolution of the outer solar system. However, observing these faint objects is …

We report six stellar occultations by Phoebe (Saturn IX), an irregular satellite of Saturn,
obtained between mid-2017 and mid-2019. The 2017 July 6 event was the first stellar …

Harmon et al. Arecibo radar observations from 1992 provided some of the most precise line-
of-sight distance (ranging) measurements of Ganymede and Callisto to date. We report 18 …

Estudos de Geografia Física demandam uma leitura de ambientes que conceba os atributos
naturais e antrópicos como forças motrizes de sistemas que alteram, ao longo do tempo …

Under the tutoring of Doctor Pedro Machado, I worked on the subject of stellar occultations
for my Seminars and Traineeship courses and this thesis as well, focusing on the creation of …