Workshop on the Physical Properties of Asteroids - Paris, 22-23 March 2010



The study of asteroid in the 2010 perspective

As the study of asteroids has become a primary goal in planetary science, many teams observe and acquire data on these small worlds. Each team has its own specificity and expertize, leading to different method of analysis and scientific outputs.

Toward a global inversion algorithm

Given the specificity of existing observation techniques (disk-resolved imaging, optical light-curves, radar echoes, thermal imaging, stellar occultations...), the physical properties of asteroids can be best derived from a combination of these different sources than separatedly.
We thus propose specialists from each observing technique to present their observations, along with the information they extract to be used in synergy with other measurements.

Data inter-operability and exchange

The development of an extensive inversion method require first an agreement to exchange between participants. As the acquisition of data on large ground-based facilities (VLT, Keck, Arecibo...) or spaceborne telescopes (HST) is always a challenge, the share of data is of course subject to the discretion of its owner. We however propose participants to consider the possibility to provide data after publication to the community.

Local and scientific organizing committee

Scientific organizing committee (SOC)

  • Jérôme Berthier (IMCCE, Paris Observatory)
  • Benoit Carry (LESIA, Paris Observatory)
  • Mikko Kaasalainen (Tempere University of Technology)
  • Marcello Fulchignoni (LESIA, Paris Observatory)

Local organizing committee (LOC)

  • Jérôme Berthier (IMCCE, Paris Observatory)
  • Benoit Carry (LESIA, Paris Observatory)
  • Marcello Fulchignoni (LESIA, Paris Observatory)


Name Institute Speciality
Jerôme Berthier IMCCE, Paris Observatory, FR Occultations / Ephemeris
Benoît Carry LESIA, Paris Observatory, FR AO images
Al Conrad Keck Observatory, USA IAU WG on coordinates
Marco Delbò Nice Observatory, FR Interferometry
Josef Durech Charles University, CZ Sparse photometry
Marcello Fulchignoni LESIA, Paris Observatory, FR Spatial observations
Laurent Jorda Marseille Observatory, FR Spacecraft data
Mikko Kaasalainen Tempere University, FI Light-curves
Cédric Leyrat
LESIA, Paris Observatory, FR Thermal photometry
Franck Marchis SETI Institute, USA AO images
Bill Merline SwRI, USA AO images
Thomas Müller
Max Planck, G Thermal photometry
Migo Mueller
Nice Observatory, FR Thermal photometry
Mike Nolan
Arecibo Observatory, USA Radar imaging

Workshop Program

Name Contribution
B. Carry & J. Berthier Workshop openning
Day 1 - Monday 22nd - Morning
F. Marchis Satellite detection and shape from images
B. Carry Shape extraction from disk-resolved images
Day 1 - Monday 22nd - Afternoon
J. Berthier Shape and size throught stellar occultations
L. Jorda Extreme precision modelization from in situ
M. Delbò Interferometry of asteroids at VLTI
Day 2 - Tuesday 23rd - Morning
J. Durech Models from Sparse Photometry Inversion
M. Kaasalainen Light-curves and global inversion scheme
Day 2 - Tuesday 23rd - Afternoon
A. Conrad IAU WG on coordinates


We would like to thank CIAS people who supported us in preparing this workshop: Carine Briand, Marie Maudon, Saloi Sarsoura. Thanks to Julien Lecubin for the wireless connections.


The meeting will take place at the CIAS, in the Meudon campus of the Paris observatory. There are some rooms and hotel available in Meudon. For those whishing to stay in Paris there are regular trains, every 15 min., from Paris (station) gare Montparnasse to Meudon (station) gare Bellevue (travel takes about 15 min.). From the station it takes about 20 min. to arrive to the château. More information on how to reach the campus here.
For any information, please contact the LOC.

Plan of the campus of Meudon, meeting will take place at "château (bat. 9)":

How to reach the campus
  • Google Map from Train Station Meudon
  • Google Map from Train Station Bellevue
  • Google Map from RER Station Meudon Val-Fleury
  • Accomodation

    Please book your accommodation by your own There are two options: take a room in Meudon, or take a room in Paris (preferably around Montparnasse). The choice of hotels in Meudon, at reasonable distance from the Observatory, is rather limited, but they are not too expensive; there is a larger choice in Paris. The main difference will be the following: Staying in Paris, you will take the public transportation every morning to come to the meeting (about 45 min in total). Staying in Meudon, you will be closer to the Observatory, but you might take the public transportation every evening to go to Paris... For any inquery and route planning on trains, metro and bus, see

    Some suggestions in Meudon:

    • *: Etap hôtel, 3 rue de Paris, Meudon. Connection by bus line 289 (about 15min); step out at bus stop "Eglise de Meudon" and walk up "rue Terre Neuve" to "Place Jules Janssen".
    Some suggestions in Paris: