G. Dudziński
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View article: The equilibrium shape of (65) Cybele: primordial or relic of a large impact?
The equilibrium shape of (65) Cybele: primordial or relic of a large impact? Open
Context. Cybele asteroids constitute an appealing reservoir of primitive material genetically linked to the outer Solar System, and the physical properties (size and shape) of the largest members can be readily accessed by large (8m class)…
View article: Constraining the shape and density of binary asteroid (121) Hermione
Constraining the shape and density of binary asteroid (121) Hermione Open
<p align="justify"><strong>Context</strong></p> <p align="justify">(121) Hermione is a large binary asteroid [1] located at the outer edge of the asteroid belt in the Cybele region, where a…
View article: (65) Cybele is the smallest asteroid at hydrostatic equilibrium, why?
(65) Cybele is the smallest asteroid at hydrostatic equilibrium, why? Open
<p class="p1">Context &#8211; Cybele asteroids constitute an appealing reservoir of primitive material genetically linked to the outer Solar system. The physical properties (size, shape) of the largest members can be di…
View article: Gaia@home: Combining Gaia catalogue with the power of volunteer computing
Gaia@home: Combining Gaia catalogue with the power of volunteer computing Open
<p lang="en-GB" align="justify"><strong>Abstract</strong></p> <p class="western" lang="en-GB">The Gaia@home project is designed to give scientists another layer of freed…
View article: M-type (22) Kalliope: A tiny Mercury
M-type (22) Kalliope: A tiny Mercury Open
Context. Asteroid (22) Kalliope is the second largest M-type asteroid in the main belt and is orbited by a satellite, Linus. Whereas the mass of Kalliope is already well constrained thanks to the presence of a moon, its volume is still poo…
View article: VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis
VLT/SPHERE imaging survey of the largest main-belt asteroids: Final results and synthesis Open
Context. Until recently, the 3D shape, and therefore density (when combining the volume estimate with available mass estimates), and surface topography of the vast majority of the largest ( D ≥ 100 km) main-belt asteroids have remained poo…
View article: New constraints on the physical properties and dynamical history of Centaur 174P/Echeclus
New constraints on the physical properties and dynamical history of Centaur 174P/Echeclus Open
Since 2005 December, recurrent outbursts have been observed for Centaur 174/P Echeclus, confirming it is an active object. Thanks to a large number of photometric data obtained between 2001 April and 2019 December, we were able to compute …
View article: An advanced multipole model for (216) Kleopatra triple system
An advanced multipole model for (216) Kleopatra triple system Open
Aims. To interpret adaptive-optics observations of (216) Kleopatra, we need to describe an evolution of multiple moons orbiting an extremely irregular body and include their mutual interactions. Such orbits are generally non-Keplerian and …
View article: Volume uncertainty of (7) Iris shape models from disc-resolved images
Volume uncertainty of (7) Iris shape models from disc-resolved images Open
High angular resolution disc-resolved images of (7) Iris collected by VLT/SPHERE instrument are allowed for the detailed shape modelling of this large asteroid revealing its surface features. If (7) Iris did not suffer any events catastrop…
View article: The Europlanet Telescope Network: A global collaboration in support of planetary sciences
The Europlanet Telescope Network: A global collaboration in support of planetary sciences Open
Planetary sciences is an exciting part of astronomy, and even though space missions are nowadays providing high-quality data from remote and in-situ measurements of the planets, asteroids and comets, ground-based observations are still yie…
View article: Thermal properties of large main-belt asteroids observed by<i>Herschel</i>PACS
Thermal properties of large main-belt asteroids observed by<i>Herschel</i>PACS Open
Non-resolved thermal infrared observations enable studies of thermal and physical properties of asteroids via thermo-physical models provided the shape and rotational properties of the target are well determined. We used calibration-progra…
View article: Physical parameters of selected <i>Gaia</i> mass asteroids
Physical parameters of selected <i>Gaia</i> mass asteroids Open
Context. Thanks to the Gaia mission, it will be possible to determine the masses of approximately hundreds of large main belt asteroids with very good precision. We currently have diameter estimates for all of them that can be used to comp…
View article: Volume uncertainty assessment method of asteroid models from disk-integrated visual photometry
Volume uncertainty assessment method of asteroid models from disk-integrated visual photometry Open
The need for more accurate asteroid models is perhaps secondary to the need to measure their quality. The uncertainties of models' parameters propagate to quantities like volume or density -- the most important and informative properties o…
View article: The shape of (7) Iris as evidence of an ancient large impact?
The shape of (7) Iris as evidence of an ancient large impact? Open
Context. Asteroid (7) Iris is an ideal target for disk-resolved imaging owing to its brightness ( V ~ 7–8) and large angular size of 0.33′′ during its apparitions. Iris is believed to belong to the category of large unfragmented asteroids …
View article: Volume uncertainty assessment method of asteroid models from disc-integrated visual photometry
Volume uncertainty assessment method of asteroid models from disc-integrated visual photometry Open
The need for more accurate asteroid models is perhaps secondary to the need\nto measure their quality. The uncertainties of models' parameters propagate to\nquantities like volume or density -- the most important and informative\npropertie…
View article: The impact crater at the origin of the Julia family detected with VLT/SPHERE?
The impact crater at the origin of the Julia family detected with VLT/SPHERE? Open
Context. The vast majority of the geophysical and geological constraints (e.g., internal structure, cratering history) for main-belt asteroids have so far been obtained via dedicated interplanetary missions (e.g., ESA Rosetta, NASA Dawn). …
View article: Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids
Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids Open
\n Context. The available set of spin and shape modelled asteroids is strongly biased against slowly rotating targets and those with low lightcurve amplitudes. This is due to the observing selection effects. As a consequence, the current p…
View article: Shaping asteroid models using genetic evolution (SAGE)
Shaping asteroid models using genetic evolution (SAGE) Open
In this work we present SAGE (Shaping Asteroid models using Genetic\nEvolution) asteroid modelling algorithm based solely on photometric lightcurve\ndata. It produces non-convex shapes, rotation axes orientati and rotational\nperiods of as…
View article: A new non-convex model of the binary asteroid (809) Lundia obtained with the SAGE modelling technique
A new non-convex model of the binary asteroid (809) Lundia obtained with the SAGE modelling technique Open
We present a new non-convex model of the binary asteroid (809) Lundia. A SAGE\n(Shaping Asteroids with Genetic Evolution) method using disc-integrated\nphotometry only was used for deriving physical parameters of this binary\nsystem. The m…
View article: Statistical analysis of the ambiguities in the asteroid period determinations
Statistical analysis of the ambiguities in the asteroid period determinations Open
Among asteroids there exist ambiguities in their rotation period\ndeterminations. They are due to incomplete coverage of the rotation, noise\nand/or aliases resulting from gaps between separate lightcurves. To help to\nremove such uncertai…