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Nuclear magnitudes and the size distribution of Jupiter family comets
Abstract We present a new catalog of absolute nuclear magnitudes of Jupiter family (JF) comets, which is an updated version of our previous catalog [Tancredi, G., Fernandez, J.A., Rickman, H.,Expand
CCD Photometry of Cometary Nuclei, I: Observations from 1990–1995
Abstract CCD photometry of 18 Jupiter family comets, observed at medium and large heliocentric distances, was carried out between April 1990 and July 1995. This is part of a long-term observationalExpand
A catalog of observed nuclear magnitudes of Jupiter family comets
A catalog of a sample of 105 Jupiter family (JF) comets (defined as those with Tisserand constants T > 2 and orbital periods P < 20 yr) is presented with our "best estimates" of their absolut ...
A criterion to classify asteroids and comets based on the orbital parameters
Abstract The classification criterion between asteroids and comets has evolved in recent decades, but the main distinction remains unchanged. Comets present gas and dust ejection from the surface atExpand
A ring system detected around the Centaur (10199) Chariklo
Observations of a multichord stellar occultation revealed the presence of a ring system around (10199) Chariklo, which is a Centaur—that is, one of a class of small objects orbiting primarily between Jupiter and Neptune—with an equivalent radius of 124  9 kilometres. Expand
Charon's size and an upper limit on its atmosphere from a stellar occultation
Observations from a multi-station stellar occultation by Charon are reported, which are used to derive the radius of Pluto and Charon, RC = 603.6 ± 1.4 km (1σ), and the density of ρ = 1.71 ± 0.08 g cm-3.3 (3σ) nanobar, assuming respectively a pure nitrogen or pure methane atmosphere. Expand
A meteorite crater on Earth formed on September 15, 2007: The Carancas hypervelocity impact
On September 15, 2007, a bright fireball was observed and a big explosion was heard by many inhabitants near the southern shore of Lake Titicaca. In the community of Carancas (Peru), a 13.5 m craterExpand
Which are the dwarfs in the Solar System
The International Astronomical Union recently adopted a new definition of planets in our Solar System. A new category of objects was introduced: a “dwarf planet.” This is “a celestial body that hasExpand
Granular physics in low-gravity environments using discrete element method
Granular materials of different sizes are present on the surface of several atmosphereless Solar system bodies. The phenomena related to granular materials have been studied in the framework of theExpand
Albedo and atmospheric constraints of dwarf planet Makemake from a stellar occultation
The disappearances and reappearances of the star were abrupt, showing that Makemake has no global Pluto-like atmosphere at an upper limit of 4–12 nanobar (1σ) for the surface pressure, although a localized atmosphere is possible. Expand