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Workshop of MW-Gaia COST Action 18104, Working Group 3, Planetary Systems Near and Far

Scientific Organizing Committee: Prof. Karri Muinonen (chair), Dr. Anne Virkki, Dr. Paolo Tanga, Dr. Alberto Cellino, Dr. Olga Muñoz, Dr. Gorden Videen, and Dr. Antti Penttilä

Local Organizing Committee: Dr. Antti Penttilä (chair), Dr. Anne Virkki, Prof. Karri Muinonen, Department of Physics, University of Helsinki

Workshop dates: September 28–29, 2021

Workshop scope

Asteroids and comets are the key to the evolution of the Solar System. These small Solar System objects (SSOs) are being systematically observed, with unprecedented precision in photometry, spectroscopy, and astrometry, by the ESA Gaia Space Mission. The workshop will cover the synergies and challenges in the combination of the Gaia data and data from other sources, that is, from ground-based astronomical observations and space missions to small SSOs. The former include astrometry, occultations, spectroscopy, polarimetry, and photometry, whereas the latter include the high-resolution observations of asteroid Ryugu by the Hayabusa2 mission (JAXA), of asteroid Bennu by the OSIRIS-REx mission (NASA), and of Comet 67P/Churyumov-Gerasimenko by the Rosetta mission (ESA). How Gaia relates to future SSO space missions, such as DART (NASA) and Hera (ESA), Comet Interceptor (ESA), and Destiny+ (JAXA), will be addressed.

The workshop improves the understanding of the physics of small SSOs to draw inferences on their origin and formation. Topics cover, for example, exploitation of the extraordinary accuracy of, first, Gaia astrometry for orbit improvement, navigation to mission targets, and asteroid mass determination, and, second, Gaia photometry for the retrieval of asteroid phase curve parameters, shapes, and rotational characteristics. Tutorial sessions are organized using pre-recorded videos on data analysis techniques in astrometry and photometry, including applications of machine learning techniques to large samples of asteroid data.

Program

Program with abstracts: MW_GAIA_Workshop_Program.pdf

The program is composed of invited oral presentations with a duration of 20 min each (15 min for the talk, 5 min for questions, answers, and change of speaker). Additionally, there will be specific sessions for discussion.

Tue 28.9. (EEDT)
8:55	Karri Muinonen	Opening of the workshop
9:00	Paolo Tanga	The role of asteroid observations by Gaia: preparing the exploitation of the first full-size data release
9:20	Nicholas Moskovitz	Asteroid characterization at Lowell Observatory
9:40	Irina Belskaya	Asteroid magnitude phase curve parameters: accuracy and reliability
10:00	Dagmara Oszkiewicz	Asteroid phase curves using dense differential and sparse relative photometry
10:20	coffee break
10:50	Alberto Cellino	Going toward a strengthened multi-disciplinary approach in asteroid science
11:10	Eri Tatsumi	Are Ryugu and Bennu from the same parent body or not?
11:30	Eric McLennan	Asteroid shapes and thermophysical modeling: (3200) Phaethon as a case study
11:50	Tomas Kohout	Comet Interceptor and Hera -- Revolutionary planetary mission concepts
12:10	lunch
13:30	Antoine Pommerol	Asteroids and comets: The quest for suitable analogues
13:50	Gorden Videen	Polarized light scattering from regolith simulants
14:10	Maria Gritsevich	In search for the missing link: recovering samples from Small Solar System bodies
14:30	Mikael Granvik	In-situ monitoring of the surface degradation on a near-Sun asteroid
14:50	coffee break
15:20	Marco Delbo	Observational constraints to the initial asteroid size distribution: the Gaia perspective.
15:40	Federica Spoto	A new weighting scheme to combine Gaia and ground-based observations
16:00	Grigori Fedorets	Searching for asteroid binaries in the wobble of Gaia astrometry
16:20	Lauri Siltala	Asteroid mass determination with Gaia
16:40	Discussion	Gaia data analysis techniques
20:15	Conference dinner
Wed 29.9. (EEDT)
8:55	Karri Muinonen	Opening of the day 2
9:00	Annika Gustafsson	Revealing Regolith Properties of Asteroids Using Radiative Transfer Modeling
9:20	Joe Masiero	Chasing asteroids in the infrared: NEOWISE and NEO Surveyor
9:40	Xiaobin Wang	SSO data in time-domain photometric surveys
10:00	Karri Muinonen	Asteroid photometric and polarimetric phase curves interpreted using synoptic scattering models
10:20	coffee break
10:50	Julia Martikainen	Modeling light scattering by Martian atmospheric dust
11:10	Matthew Berg	Digital Holography: Capabilities and Concepts for Cometary Grain and Regolith Characterization
11:30	Johannes Markkanen	Thermophysics of dust particles: Implications on cometary activity
11:50	Yuna Kwon	Polarimetric study of the dust environment of comet 67P/Churyumov-Gerasimenko around the end of its Southern summer
12:10	lunch
13:30	Evgenij Zubko	On the nature of dispersion of linear polarization observed in comets at large phase angles
13:50	Olga Munoz	Understanding the Negative Polarization Branch of comets and asteroids
14:10	Jürgen Blum	Comets as clues to planetesimal formation
14:30	coffee break
15:00	Benoit Carry	The impact of Gaia on the study of asteroid interiors
15:20	Anne Virkki	Characterizing dielectric properties of near-Earth asteroids using radar observations
15:40	Deborah Domingue	Comparing photometric properties of Eros, Itokawa, and Ryugu
16:00	Antti Penttilä	Deep learning tools for asteroid taxonomy with Gaia and other surveys
16:20	Discussion
17:00	Karri Muinonen	Closing of the Workshop

Invited speakers (ViZ = virtually via Zoom, OZ = on site via Zoom)

The workshop attendance is by invitation only, with the restriction of maximum 25 participants on site. The invited speakers are

Irina Belskaya (ViZ), Astronomical Institute of Kharkiv, V. N. Karazin National University, Ukraine
Matthew Berg (OZ), University of Kansas, KA, USA
Jürgen Blum (ViZ), Technische Universität Braunschweig, Germany
Benoit Carry (ViZ), Observatoire de la Cote d’Azur, France
Alberto Cellino (OZ), INAF - Osservatorio Astrofisico di Torino, Italy
Marco Delbo (ViZ), Observatoire de la Cote d’Azur, France
Deborah Domingue (ViZ), Planetary Science Institute, USA
Grigori Fedorets (OZ), Astrophysics Research Centre, Queen’s University Belfast, UK
Mikael Granvik (ViZ), University of Helsinki, Finland
Maria Gritsevich (OZ), Finnish Geospatial Research Institute, Finland
Tomas Kohout (OZ), University of Helsinki, Finland
Annika Gustafsson (ViZ), Southwest Research Institute, CO, USA
Yuna Kwon (ViZ), Technische Universität Braunschweig, Germany
Eric MacLennan (OZ), University of Helsinki, Finland
Johannes Markkanen (OZ), Max Planck Institute for Solar System Research, Germany
Julia Martikainen (OZ), Instituto de Astrofísica de Andalucía, CSIC. Glorieta de la Astronomía, Spain
Joe Masiero (ViZ), Jet Propulsion Laboratory, California Institute of Technology, USA
Nick Moskovitz (ViZ), Lowell Observatory, AZ, USA
Jarmo Moilanen (ViZ), Finnish Geospatial Research Institute, Finland
Karri Muinonen (OZ), University of Helsinki, Finland
Olga Munoz (OZ), Instituto de Astrofísica de Andalucía, CSIC. Glorieta de la Astronomía, Spain
Dagmara Oszkiewicz (OZ), Institute Astronomical Observatory, Adam Mickiewicz University, Poland
Antti Penttilä (OZ), University of Helsinki, Finland
Antoine Pommerol (ViZ), WP-Physikalisches Institut, University of Bern, Switzerland
Vasilij Shevchenko (ViZ), Astronomical Institute of Kharkiv, V. N. Karazin National University, Ukraine
Lauri Siltala (OZ), University of Helsinki, Finland
Federica Spoto (ViZ), Observatoire de la Cote d’Azur, France
Paolo Tanga (OZ), Observatoire de la Cote d’Azur, France
Eri Tatsumi (ViZ), Insituto Astrofísica de Canarias, Spain
Gorden Videen (OZ), Space Science Institute, USA
Anne Virkki (OZ), University of Helsinki, Finland
Xiaobin Wang (ViZ), Yunnan Observatories, Chinese Academy of Sciences, China
Evgenij Zubko (OZ), Humanitas College, Kyung Hee University, South Korea

Group photo at September 29, 2021

PSR > Asteroids and Comets: Revealing the History of the Solar System > Group photo.jpg

All other participants

Virtual attendance via Zoom, to follow the presentations, will be possible for MW-Gaia participants and other interested colleagues. Note that there is likely to be an upper limit for the number of participants. Please send email to antti.i.penttila@helsinki.fi to receive the connection details.

Venue

The workshop is organized in hybrid mode with participants attending virtually and on site. Both modes of attendance will involve scientific presentations via Zoom. Mankeliaitta of the Krapi Conference Center (Tuusula, Finland) serves as the workshop venue, with accommodation at the Onnela premises.

Support

The workshop is supported by the Gaia COST Action MW-Gaia (CA18104) and the Academy of Finland projects InSight (345115) and PlanetS (325805).