Asteroid (21) Lutetia: Disk-resolved Photometric Analysis of Baetica Region
P.H. Hasselmann, M.A. Barucci, S. Fornasier, C. Leyrat, J.M. Carvano,, D. Lazzaro, H. Sierks

TL;DR
This study provides a detailed photometric analysis of the Baetica region on asteroid Lutetia using OSIRIS images, revealing surface heterogeneity, spectral properties, and regolith characteristics through advanced modeling techniques.
Contribution
It applies disk-function, phase function, and Hapke models to high-resolution images to map surface properties and compositional variations of Lutetia's Baetica region.
Findings
Detected a dichotomy between Gallicum and Danuvius-Sarnus Labes in surface properties.
Mapped spectral slope and albedo variations across the Baetica region.
Identified differences in regolith maturity and composition based on photometric parameters.
Abstract
(21) Lutetia has been visited by Rosetta mission on July 2010 and observed with a phase angle ranging from 0.15 to 156.8 degrees. The Baetica region, located at the north pole has been extensively observed by OSIRIS cameras system. Baetica encompass a region called North Pole Crater Cluster (NPCC), shows a cluster of superposed craters which presents signs of variegation at the small phase angle images. For studying the location, we used 187 images distributed throughout 14 filter recorded by the NAC (Narrow Angle Camera) and WAC (Wide Angle Camera) taken during the fly-by. We photometrically modeled the region using Minnaert disk-function and Akimov phase function to finally reconstruct a resolved spectral slope map at 5 and 20 degrees of phase angle. We observed a dichotomy between Gallicum and Danuvius-Sarnus Labes in the NPCC, but no significant phase reddening. In the next step, we…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
