A5068747378- Astro and Planetary Science
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Isotope Analysis in Ecology
- Geological and Geochemical Analysis
- Astronomical Observations and Instrumentation
- Geology and Paleoclimatology Research
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Space Exploration and Technology
- Astronomy and Astrophysical Research
- Geomagnetism and Paleomagnetism Studies
- High-pressure geophysics and materials
- Spacecraft and Cryogenic Technologies
- Calibration and Measurement Techniques
- Astronomical and nuclear sciences
- Space exploration and regulation
- Methane Hydrates and Related Phenomena
- Plant Diversity and Evolution
- Phytochemical Studies and Bioactivities
- Atmospheric Ozone and Climate
- Advanced Optical Sensing Technologies
- Paleontology and Stratigraphy of Fossils
- Archaeology and ancient environmental studies
- Archaeological Research and Protection
European Southern Observatory
2014-2025
Massachusetts Institute of Technology
2019-2024
Planetary Science Institute
2020-2024
European Southern Observatory
2022
Centre National de la Recherche Scientifique
2014-2021
Laboratoire d’Astrophysique de Marseille
2014-2021
Colorado School of Mines
2021
Sorbonne Université
2021
Auburn University
2021
Lunar and Planetary Institute
2021
Abstract The Outer Solar System Origins Survey (OSSOS), a wide-field imaging program in 2013–2017 with the Canada–France–Hawaii Telescope, surveyed 155 deg 2 of sky to depths m r = 24.1–25.2. We present 838 outer solar system discoveries that are entirely free ephemeris bias. This increases inventory trans-Neptunian objects (TNOs) accurately known orbits by nearly 50%. Each minor planet has 20–60 Gaia /Pan-STARRS-calibrated astrometric measurements made over 2–5 oppositions, which allows...
The recent discovery by Pan-STARRS1 of 1I/2017 U1 (`Oumuamua), on an unbound and hyperbolic orbit, offers a rare opportunity to explore the planetary formation processes other stars, effect interstellar environment planetesimal surface. 1I/`Oumuamua's close encounter with inner Solar System in 2017 October was unique chance make observations matching those used characterize small-body populations our own System. We present near-simultaneous g$^\prime$, r$^\prime$, J photometry colors...
Meteorites have long been considered as reflections of the compositional diversity main belt asteroids and consequently they used to decipher their origin, formation, evolution. However, while some meteorites are known sample surfaces metallic, rocky hydrated (about one-third mass belt), low-density icy (C-, P-, D-types), representing rest belt, appear be unsampled in our meteorite collections. Here we provide conclusive evidence that surface compositions these bodies compatible with those...
Context. Until recently, the 3D shape, and therefore density (when combining volume estimate with available mass estimates), surface topography of vast majority largest ( D ≥ 100 km) main-belt asteroids have remained poorly constrained. The improved capabilities SPHERE/ZIMPOL instrument opened new doors into ground-based asteroid exploration. Aims. To constrain formation evolution a representative sample large asteroids, we conducted high-angular-resolution imaging survey 42...
Context . The source regions of ordinary chondrites (~80% all falls) and large S-type near-Earth objects (NEOs; ~30%) have recently been identified with three young asteroid families (Karin, Koronis, Massalia) being at the origin most chondrite falls. Aims present work is a continuation our previous studies aims to determine remaining meteorite NEO classes, an emphasis on carbonaceous (CM, CI, CO, CV, CK, CR, CH, CB, or C-ungrouped). Methods We studied 38 individual families, including old...
We report the discovery, tracking and detection circumstances for 85 trans-Neptunian objects (TNOs) from first 42 deg$^{2}$ of Outer Solar System Origins Survey (OSSOS). This ongoing $r$-band survey uses 0.9 field-of-view MegaPrime camera on 3.6 m Canada-France-Hawaii Telescope. Our orbital elements these TNOs are precise to a fractional semi-major axis uncertainty $<0.1\%$. achieve this precision in just two oppositions, as compared normal 3-5 via dense observing cadence innovative...
ABSTRACT CM chondrites are the most common type of hydrated meteorites, making up ∼1.5% all falls. Whereas experienced only low-temperature (∼0°C–120°C) aqueous alteration, existence a small fraction that suffered both hydration and heating complicates our understanding early thermal evolution parent body(ies). Here, we provide new constraints on collisional history CM-like bodies from comparison between newly acquired spectral measurements main-belt Ch/Cgh-type asteroids (70 objects)...
Asteroid (16) Psyche is the target of NASA mission. It considered one few main-belt bodies that could be an exposed proto-planetary metallic core and would thus related to iron meteorites. Such association however challenged by both its near- mid-infrared spectral properties reported estimates density. Here, we aim refine density set further constraints on bulk composition determine potential meteoritic analog. We observed with ESO VLT/SPHERE/ZIMPOL as part our large program (ID 199.C-0074)....
Abstract We examined two decades of SpeX/NASA Infrared Telescope Facility observations from the Small Main-Belt Asteroid Spectroscopic Survey (SMASS) and MIT–Hawaii Near-Earth Object (MITHNEOS) to investigate uncertainties systematic errors in reflectance spectral slope measurements asteroids. From 628 spectra 11 solar analogs used for calibration asteroid spectra, we derived an uncertainty <?CDATA ${\sigma }_{s^{\prime} }=4.2 \% \,\mu {{\rm{m}}}^{-1}$?> on over 0.8–2.4 μ m. Air mass...
Abstract We report 491 new near-infrared spectroscopic measurements of 420 near-Earth objects (NEOs) collected on the NASA InfraRed Telescope Facility as part MIT-Hawaii NEO Spectroscopic Survey. These were combined with previously published data from Binzel et al. and bias-corrected to derive intrinsic compositional distribution overall population, well subpopulations coming various escape routes (ERs) in asteroid belt beyond. The resulting distributions reflect gradient belt, decreasing...
Abstract We report the results of a spectroscopic survey candidate T subdwarfs identified by Backyard Worlds: Planet 9 program. Near-infrared spectra 31 sources with red J − W2 colors and large -band reduced proper motions show varying signatures subsolar metallicity, including strong collision-induced H 2 absorption, obscured methane water features, weak K i absorption. These metallicity are supported spectral model fits 3D velocities, indicating thick disk halo population membership for...
Abstract 1998 KY 26 is a tiny near-Earth asteroid ( H = 26.1) discovered in 1998. It has been selected as the target of Hayabusa2 extended mission, which will rendezvous with 2031. However, one most basic physical properties, size, remains poorly constrained, posing potential challenges for spacecraft operations. We aimed at constraining size by means thermal infrared observations. performed observations using ESO Very Large Telescope/VISIR on three consecutive nights 2024 May. After...
Abstract Asteroid (22) Kalliope is the densest known asteroid in main belt, with a density of ρ = 4.4 ± 0.46 g cm−3, suggesting that it differentiated. has recently been identified as parent body family collisional fragments, which located so-called ”pristine zone” outer between 2.825 and 2.955 au. Kalliope’s spectroscopic classification uncertain, but broadly associated iron meteorites. We combined visible reflectance spectra from Gaia Data Release 3, SDSS spectrophotometry, new...
The very wide binary asteroid (VWBA) population is a small subset of the known and multiple asteroids made systems with widely orbiting satellites long orbital periods, on order tens to hundreds days. origin these debatable, most members this are poorly characterized. We aim develop solutions for some VWBA population, allowing us constrain possible formation pathways unusual population. compiled all available high-angular-resolution imaging archival data from large ground- space-based...
Anhydrous pyroxene-rich interplanetary dust particles (IDPs) have been proposed as surface analogs for about two-thirds of all C-complex asteroids. However, this suggestion appears to be inconsistent with the presence hydrated silicates on surfaces some these asteroids including Ceres. Here we report enstatite (pyroxene) two C-type (Ceres and Eugenia) based their spectral properties in mid-infrared range. The component is particularly unexpected case Ceres because most thermal evolution...
ABSTRACT Photometry of moving sources typically suffers from a reduced signal-to-noise ratio (S/N) or flux measurements biased to incorrect low values through the use circular apertures. To address this issue, we present software package, TRIPPy: TRailed Image in Python. TRIPPy introduces pill aperture, which is natural extension aperture appropriate for linearly trailed sources. The shape rectangle with two semicircular end-caps and described by three parameters, trail length angle, radius....
Context. The high-angular-resolution capability of the new-generation ground-based adaptive-optics camera SPHERE at ESO VLT allows us to assess, for very first time, cratering record medium-sized (D~100-200 km) asteroids from ground, opening prospect a new era investigation asteroid belt's collisional history. Aims. We investigate here history (6) Hebe and challenge idea that may be parent body ordinary H chondrites, most common type meteorites found on Earth (~34% falls). Methods. observed...
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 ESA Rosetta, NASA Dawn). high angular resolution SPHERE/ZIMPOL, new-generation visible adaptive-optics camera at ESO VLT, implies that these science objectives can now be investigated from ground a large fraction D ≥ 100 km asteroids. sharp images acquired by this instrument used to...
The Colours of the Outer Solar System Origins Survey (Col-OSSOS) is acquiring near-simultaneous $g$, $r$, and $J$ photometry unprecedented precision with Gemini North Telescope, targeting nearly a hundred trans-Neptunian objects (TNOs) brighter than $m_r=23.6$ mag discovered in Survey. Combining optical near-infrared well-characterized detection efficiency Col-OSSOS target sample will provide first flux-limited compositional dynamical map outer System. In this paper, we describe our...
Context. It has recently been proposed that the surface composition of icy main-belt asteroids (B-, C-, Cb-, Cg-, P-, and D-types) may be consistent with chondritic porous interplanetary dust particles (CP IDPs).