Aims: The orbit of the outer satellite Alexhelios of (216) Kleopatra is already constrained by adaptive-optics astrometry obtained with the VLT/SPHERE instrument. However, there is also a preceding occultation event in 1980 attributed to this satellite. Here, we try to link all observations, spanning 1980-2018, because the nominal orbit...
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2022 (v1)Journal articleUploaded on: December 3, 2022
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2017 (v1)Journal article
Context. The high-angular-resolution capability of the new-generation ground-based adaptive-optics camera SPHERE at ESO VLT allows us to assess, for the very first time, the cratering record of medium-sized (D ∼ 100–200 km) asteroids from the ground, opening the prospect of a new era of investigation of the asteroid belt's collisional history....
Uploaded on: February 28, 2023 -
October 2022 (v1)Journal article
Context. Families of asteroids generated by the collisional fragmentation of a common parent body have been identified using clustering methods of asteroids in their proper orbital element space. However, there is growing evidence that some of the real families are larger than the corresponding cluster of objects in orbital elements, and there...
Uploaded on: December 4, 2022 -
November 2014 (v1)Journal article
In this paper we report a new transiting warm giant planet: KOI-1257 b. It was first detected in photometry as a planet-candidate by the Kepler space telescope and then validated thanks to a radial velocity :follow-up with the SOPHIE spectrograph. It orbits its host star with a period of 86,647661 d +/- 3 s and a high eccentricity of 0.772 +/-...
Uploaded on: February 28, 2023 -
January 2018 (v1)Journal article
International audience
Uploaded on: December 4, 2022 -
November 18, 2014 (v1)Journal article
In understanding the composition and internal structure of asteroids, their density is perhaps the most diagnostic quantity. We aim here at characterizing the surface composition, mutual orbit, size, mass, and density of the small main-belt binary asteroid (939) Isberga. For that, we conduct a suite of multi-technique observations, including...
Uploaded on: March 25, 2023 -
2018 (v1)Journal article
The population of large 100+ km asteroids is thought to be primordial. As such, they are the most direct witnesses of the early history of our Solar System available. Those among them with satellites allow study of the mass, and hence density and internal structure. We study here the dynamical, physical, and spectral properties of the triple...
Uploaded on: December 4, 2022 -
April 21, 2015 (v1)Journal article
International audience
Uploaded on: December 4, 2022 -
August 10, 2013 (v1)Journal article
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 from a single-chord occultation observed on 2012 October 15. If the timing of the five chords obtained in 2011 were correct, then Quaoar would possess topographic features...
Uploaded on: December 4, 2022 -
November 2017 (v1)Journal article
International audience
Uploaded on: December 3, 2022 -
2021 (v1)Journal article
Dynamical models of Solar System evolution have suggested that the so-called P-and D-type volatile-rich asteroids formed in the outer Solar System beyond Neptune's orbit and may be genetically related to the Jupiter Trojans, the comets and small Kuiper-belt objects (KBOs). Indeed, the spectral properties of P/D-type asteroids resemble that of...
Uploaded on: December 4, 2022