The planetary and lunar ephemerides DE430 and DE431 are generated by fitting
numerically integrated orbits of the Moon and planets to observations. The present-day lunar …

Amateur contributions to professional publications have increased exponentially over the
last decades in the field of planetary astronomy. Here we review the different domains of the …

The dwarf planet Eris is a trans-Neptunian object with an orbital eccentricity of 0.44, an
inclination of 44 degrees and a surface composition very similar to that of Pluto. It resides at …

We present results derived from the first multi-chord stellar occultations by the
transneptunian object (50000) Quaoar, observed on 2011 May 4 and 2012 February 17, and …

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

Context. 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 …

Context. The tenuous nitrogen (N 2) atmosphere on Pluto undergoes strong seasonal effects
due to high obliquity and orbital eccentricity, and has recently (July 2015) been observed 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 …

We present results from a multi-chord Pluto stellar occultation observed on 2015 June 29
from New Zealand and Australia. This occurred only two weeks before the NASA New …

We analyze two multi-chord stellar occultations by Pluto that were observed on 2012 July
18th and 2013 May 4th, and respectively monitored from five and six sites. They provide a …