Search Publications
The geomorphology of (21) Lutetia: Results from the OSIRIS imaging system onboard ESA's Rosetta spacecraft
Jorda, L.; Stephan, K.; Lamy, P. +27 more
The surface of (21) Lutetia is highly complex with significant interactions between ancient and more recent structures. This work attempts to summarize the surface geomorphology observed using the high resolution images from OSIRIS, the imaging system onboard the European Space Agency's Rosetta spacecraft. A wide range of surface morphologies are …
Boulders on Lutetia
Lara, L. M.; Bertaux, J. -L.; Lamy, P. +37 more
More than 200 boulders are among the many prominent geological features seen on Lutetia by the OSIRIS cameras onboard Rosetta. Most are concentrated around the central crater in Baetica regio with a few more apparently associated with Patavium crater. The size range of boulders visible to OSIRIS is about 60-300 m. We model the trajectories of boul…
Shape modeling technique KOALA validated by ESA Rosetta at (21) Lutetia
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +44 more
We present here a comparison of our results from ground-based observations of asteroid (21) Lutetia with imaging data acquired during the flyby of the asteroid by the ESA Rosetta mission. This flyby provided a unique opportunity to evaluate and calibrate our method of determination of size, 3-D shape, and spin of an asteroid from ground-based obse…
The evolution of Venus: Present state of knowledge and future exploration
Leblanc, François; Chassefière, Eric; Marty, Bernard +1 more
A detailed characterization of the formation and evolution of Venus is a key link to the study of terrestrial planets, and to their divergent evolutions. While Earth and to a lesser extent Mars (thanks to the analysis of SNC meteorites) are extensively studied in a comparative planetology context, the history of the most Earth-like planet of the S…
Possible evidence for partial differentiation of asteroid Lutetia from Rosetta
Pätzold, Martin; Weissman, Paul R.; Richter, Ingo +10 more
The petrologic diversity of meteorites demonstrates that planetesimals ranged from unmelted, variably metamorphosed aggregates to fully molten, differentiated bodies. However, partially differentiated bodies have not been unambiguously identified in the asteroid belt. New constraints on the density, composition, and morphology of 21 Lutetia from t…
Fluvial landforms on fresh impact ejecta on Mars
Mangold, N.
Fluvial valleys provide critical clues to the distribution and state of water throughout the history of the planet Mars. Early in Mars' history (<3.7 Gy), the climate may have been warmer than at present leading to the development of valley networks. Younger valleys formed on volcanic and glacial landforms under colder conditions than experienc…
Kinetic simulations of finite gyroradius effects in the lunar plasma environment on global, meso, and microscales
Barabash, Stas; Jarvinen, Riku; Kallio, Esa +12 more
The recent in situ particle measurements near the Moon by Chandrayaan-1 and Kaguya missions as well as the earlier observation by the Lunar Prospector have shown that the Moon-solar wind interaction is more complicated than believed earlier. The new observations have arisen the need for a detailed modelling of the near surface plasma-surface proce…
SPICAV IR acousto-optic spectrometer experiment on Venus Express
Bertaux, Jean-Loup; Korablev, Oleg; Reberac, A. +11 more
SPICAV IR, a part of SPICAV/SOIR suite on Venus Express, is a compact single pixel spectrometer for the spectral range of 0.65-1.7 µm based on acousto-optical tunable filter (AOTF) technology. SPICAV IR is derived from SPICAM IR operating on Mars Express, the first AOTF spectrometer in the deep space, and adapted for Venus atmosphere measure…
Ion densities and velocities in the inner plasma torus of Saturn
Persoon, A. M.; Wahlund, J. -E.; Morooka, M. W. +1 more
We present plasma data from the Cassini Radio and Plasma Wave Science (RPWS) Langmuir probe (LP), mapping the ion density and velocity of Saturn's inner plasma torus. Data from 129 orbits, recorded during the period from the 1st of February 2005 to the 27th of June 2010, are used to map the extension of the inner plasma torus. The dominant part of…
Geological map and stratigraphy of asteroid 21 Lutetia
Massironi, Matteo; Pajola, Maurizio; Tubiana, Cecilia +15 more
The OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System) images acquired during the recent Rosetta fly-by of Lutetia (10th of July 2010), enabled us to unravel the long geological history of the asteroid. This is recorded on its highly varied surface which displays geological units of disparate ages. In particular, using images of t…