87 citations · 414 across the 12 of their papers we have counts for
12 papers
Constraints on the structure and seasonal variations of Triton's atmosphere from the 5 October 2017 stellar occultation and previous observations
J. Marques Oliveira, B. Sicardy, A. R. Gomes-Júnior +234
A stellar occultation by Neptune's main satellite, Triton, was observed on 5 October 2017 from Europe, North Africa, and the USA. We derived 90 light curves from this event, 42 of…
The 2014-2015 Brazilian Mutual Phenomena campaign for the Jovian satellites and improved results for the 2009 events
B. Morgado, R. Vieira-Martins, M. Assafin +15
Progress in astrometry and orbital modelling of planetary moons in the last decade enabled better determinations of their orbits. These studies need accurate positions spread over…
Pluto's ephemeris from ground-based stellar occultations (1988-2016)
J. Desmars, E. Meza, B. Sicardy +13
From 1988 to 2016, several stellar occultations have been observed to characterize Pluto's atmosphere and its evolution (Meza et al, 2019). From each stellar occultation, an accura…
Pluto's lower atmosphere and pressure evolution from ground-based stellar occultations, 1988-2016
E. Meza, B. Sicardy, M. Assafin +167
Context. Pluto's tenuous nitrogen (N2) atmosphere undergoes strong seasonal effects due to high obliquity and orbital eccentricity, and has been recently (July 2015) observed by th…
APPROX -- Mutual approximations between the Galilean moons. The 2016-2018 observational campaign
B. Morgado, R. Vieira-Martins, M. Assafin +23
The technique of mutual approximations accurately gives the central instant at the maximum apparent approximation of two moving natural satellites in the sky plane. This can be use…
Study of the plutino object (208996) 2003 AZ84 from stellar occultations: size, shape and topographic features
A. Dias-Oliveira, B. Sicardy, J. L. Ortiz +60
We present results derived from four stellar occultations by the plutino object (208996) 2003~AZ, detected at January 8, 2011 (single-chord event), February 3, 2012 (multi-c…
Results from the 2014 November 15th multi-chord stellar occultation by the TNO (229762) 2007 UK
Gustavo Benedetti-Rossi, Bruno Sicardy, Marc W. Buie +26
We present results derived from the first multi-chord stellar occultation by the trans-Neptunian object (229762) 2007 UK, observed on 2014 November 15. The event was observ…
Astrometry of mutual approximations between natural satellites. Application to the Galilean moons
B. Morgado, M. Assafin, R. Vieira-Martins +3
Typically we can deliver astrometric positions of natural satellites with errors in the 50-150 mas range. Apparent distances from mutual phenomena, have much smaller errors, less t…
Pluto's atmosphere from the 29 June 2015 ground-based stellar occultation at the time of the New Horizons flyby
B. Sicardy, J. Talbot, E. Meza +65
We present results from a multi-chord Pluto stellar occultation observed on 29 June 2015 from New Zealand and Australia. This occurred only two weeks before the NASA New Horizons f…
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…
Pluto's atmosphere from stellar occultations in 2012 and 2013
A. Dias-Oliveira, B. Sicardy, E. Lellouch +42
We analyze two multi-chord stellar occultations by Pluto observed on July 18th, 2012 and May 4th, 2013, and monitored respectively from five and six sites. They provide a total of…
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,…