55 citations · 311 across the 25 of their papers we have counts for
27 papers
Infrared-to-visible albedo ratio of Phobos: Comparison with primitive asteroids
T. J. Dyer, J. Beccarelli, M. Delbo +5
Aims. The ratio between infrared and visible albedo, pIR/pV, provides a simple proxy for the spectral slope of asteroid surfaces between the visible and near-infrared wavelength ra…
Twin Impact Lunar Telescope network: Lunar Impact Flash observations of the 2025 Geminids
Daniel Sheward, Marco Delbo, Chrysa Avdellidou +23
Meteoroid impacts on the Moon, observed from Earth as flashes typically lasting a few tens of milliseconds, have been monitored for three decades for determining meteoroids' size a…
Gaia DR3 supervised classification of asteroid reflectance spectra
Marco Delbo, Thomas Dyer, Ullas Bhat +3
We present a supervised, probabilistic taxonomic classification of asteroid reflectance spectra from Gaia Data Release 3 (DR3). Using high-quality Gaia DR3 spectra and a reference…
The Nysa family as the main source of unequilibrated LL ordinary chondrites
M. Marsset, P. Vernazza, M. Brož +16
Context. The origin of the petrologic diversity observed in ordinary chondrites (OCs), the most common meteorites on Earth, remains debated. Competing models invoke either depth-de…
The dependence of the asteroid rotation on their composition
T. J. Dyer, W. -H. Zhou, C. Avdellidou +4
The rotational properties of asteroids provide critical information about not only their internal structure but also their collisional and thermal histories. Previous work has reve…
Searching for primitive, dark, spectrally red asteroid families in the main belt with Gaia
Ullas Bhat, Chrysa Avdellidou, Marco Delbo +1
Dark asteroids with featureless neutral to red spectra are of particular interest due to their ability to potentially harbour primitive, hydrated, and possibly organic-rich materia…
Gaia and IRTF abundance of A-type main belt asteroids
Marco Delbo, Chrysa Avdellidou, Marjorie Galinier +4
The Missing Mantle Problem refers to the apparent scarcity of olivine rich (A-type) asteroids in the main belt, despite expectations that such bodies should be common if differenti…
NSF-DOE Vera C. Rubin Observatory Observations of Interstellar Comet 3I/ATLAS (C/2025 N1)
Colin Orion Chandler, Pedro H. Bernardinelli, Mario Jurić +305
We report on the observation and measurement of astrometry, photometry, morphology, and activityof the interstellar object 3I/ATLAS, also designated C/2025 N1 (ATLAS) with the NSF-…
Spin states of X-complex asteroids in the inner main belt -- I. Investigating the Athor and Zita collisional families
D. Athanasopoulos, J. Hanuš, C. Avdellidou +14
The aim of our study is to characterise the spin states of the members of the Athor and Zita collisional families and test whether these members have a spin distribution consistent…
EL meteorites do date the giant planet instability
Chrysa Avdellidou, Marco Delbo, David Nesvorny +2
In our recent work, we combined dynamical simulations, meteoritic data and thermal models as well as asteroid observations to argue that the current parent body of the EL meteorite…
Multicolor Photometry of Tiny Near-Earth Asteroid 2015 RN Across a Wide Range of Phase Angles: Possible Mission Accessible A-type Asteroid
Jin Beniyama, Ryou Ohsawa, Chrysa Avdellidou +10
Studying small near-Earth asteroids is important to understand their dynamical histories and origins as well as to mitigate the damage of the asteroid impact to the Earth. We repor…
Palomar discovery and initial characterization of naked-eye long period comet C/2022 E3 (ZTF)
B. T. Bolin, F. J. Masci, D. A. Duev +11
Long-period comets are planetesimal remnants constraining the environment and volatiles of the protoplanetary disc. We report the discovery of hyperbolic long-period comet C/2022 E…
Gaia view of primitive inner-belt asteroid families: Searching for the origins of asteroids Bennu and Ryugu
Marco Delbo, Chrysa Avdellidou, Kevin J. Walsh
Near-Earth asteroids Ryugu and Bennu, were visited, characterised, and sampled by the Hayabusa2 and OSIRIS-REx missions: remote sensing data and sample return analysis showed that…
Extending Lunar Impact Flash Observations into the Daytime with Short-Wave Infrared
Daniel Sheward, Marco Delbo, Chrysa Avdellidou +7
Lunar impact flash (LIF) observations typically occur in R, I, or unfiltered light, and are only possible during night, targeting the night side of a 10-60% illumination Moon, whil…
Identification of a 4.3 billion year old asteroid family and planetesimal population in the Inner Main Belt
Salvatore Ferrone, Marco Delbo, Chrysa Avdellidou +4
After performing a reassessment of the known dynamical asteroid families in the inner main belt, we report a newly discovered ancient asteroid family with an estimated age of $4.3\…
Gaia search for early-formed andesitic asteroidal crusts
Marjorie Galinier, Marco Delbo, Chrysa Avdellidou +2
Context. Andesitic meteorites are among the oldest achondrites known to date. They record volcanic events and crust formation episodes in primordial planetesimals that took place a…
Asteroid spin-states of a 4 Gyr collisional family
D. Athanasopoulos, J. Hanus, C. Avdellidou +29
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…
Spectral evolution of dark asteroid surfaces induced by space weathering over a decade
Sunao Hasegawa, Francesca E. DeMeo, Michael Marsset +20
The surface of airless bodies like asteroids in the Solar System are known to be affected by space weathering. Experiments simulating space weathering are essential for studying th…
PyNAPLE: Lunar Surface Impact Crater Detection
Daniel Sheward, Chrysa Avdellidou, Anthony Cook +4
In the last 20 years, over 600 impact flashes have been documented on the lunar surface. This wealth of data presents a unique opportunity to study the meteoroid flux of the Earth-…
Constraints on the structure and seasonal variations of Triton's atmosphere from the 5 October 2017 stellar occultation and previous observations
J. Marques Oliveira, B. Sicardy, A. R. Gomes-Júnior +234
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 of…
Very weak carbonaceous asteroid simulants I: mechanical properties and response to hypervelocity impacts
Chrysa Avdellidou, Alice DiDonna, Cody Schultz +6
The two on-going sample return space missions, Hayabusa2 and OSIRIS-REx are going to return to Earth asteroid regolith from the carbonaceous near-Earth asteroids Ryugu and Bennu. T…
Impacts on the Moon: analysis methods and size distribution of impactors
Chrysa Avdellidou, Edhah Munaibari, Raven Larson +6
We are preparing a telescope system to carry out a survey of detection and analysis of lunar impact flashes. In the framework of this project, here we present all necessary methods…
An ancient and a primordial collisional family as the main sources of X-type asteroids of the inner Main Belt
Marco Delbo, Chrysa Avdellidou, Alessandro Morbidelli
The near-Earth asteroid population suggests the existence of an inner Main Belt source of asteroids that belongs to the spectroscopic X-complex and has moderate albedos. The identi…
Temperatures of lunar impact flashes: mass and size distribution of small impactors hitting the Moon
Chrysa Avdellidou, Jeremie Vaubaillon
Lunar impact flashes have been monitored over the last 20 years for determining the mass frequency distribution of near-Earth objects in the cm-dm size range. In this work, using t…