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…
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…
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…
The cratering history of asteroid (21) Lutetia
Sierks, H.; Mottola, S.; Barbieri, C. +9 more
The European Space Agency's Rosetta spacecraft passed by the main belt asteroid (21) Lutetia on 10th July 2010. With its ∼100km size, Lutetia is one of the largest asteroids ever imaged by a spacecraft. During the flyby, the on-board OSIRIS imaging system acquired spectacular images of Lutetia's northern hemisphere revealing a complex surface scar…
(21) Lutetia spectrophotometry from Rosetta-OSIRIS images and comparison to ground-based observations
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +40 more
Here we present some preliminary results on surface variegation found on (21) Lutetia from ROSETTA-OSIRIS images acquired on 2010-07-10. The spectrophotometry obtained by means of the two cameras NAC and WAC (Narrow and Wide Angle Cameras) is consistent with ground based observations, and does not show surface diversity above the data error bars. …
Physical properties of craters on asteroid (21) Lutetia
Jorda, L.; Lara, L. M.; Bertaux, J. -L. +37 more
This paper presents an analysis of the physical properties of craters on asteroid (21) Lutetia, derived from images acquired by OSIRIS, the high-resolution cameras onboard ESA's spacecraft Rosetta. Crater morphology on (21) Lutetia fits very well with the general picture of what was known for previously visited small bodies, with a typical depth t…
The northern hemisphere of asteroid (21) Lutetia—topography and orthoimages from Rosetta OSIRIS NAC image data
Mottola, Stefano; Roatsch, Thomas; Matz, Klaus-Dieter +5 more
During the flyby at asteroid (21) Lutetia by the Rosetta spacecraft in July 2010, the OSIRIS imaging system onboard acquired several hundred images of Lutetia's surface. Images of the OSIRIS NAC (Narrow Angle Camera) comprise up to 60 m/pixel ground resolution. We analyzed 84 multi-spectral NAC images with stereo-photogrammetric methods. A 3D poin…
Thermal and shape properties of asteroid (21) Lutetia from Herschel observations around the Rosetta flyby
Altieri, B.; Valtchanov, I.; Jorda, L. +22 more
Prior to and around the Rosetta flyby of (21) Lutetia, the Herschel Space Observatory performed a collaborative observation campaign with its two photometers observing the asteroid in the far infrared, at wavelengths not covered by Rosetta's instruments. The Herschel observations, fed into a thermophysical model (TPM) using as input a shape model …