Close-up images of the final Philae landing site on comet 67P/Churyumov-Gerasimenko acquired by the ROLIS camera
S.E. Schr\"oder, S. Mottola, G. Arnold, H.-G. Grothues, R. Jaumann,, H.U. Keller, H. Michaelis, J.-P. Bibring, I. Pelivan, A. Koncz, K. Otto, E., Remetean, F. Souvannavong, B. Dolives

TL;DR
This study presents high-resolution images of Philae's final landing site on comet 67P, revealing a smooth, cracked surface with fractal roughness, and constructs a shape model based on perspective changes.
Contribution
It provides detailed close-up images and a shape model of the final landing site, revealing new insights into the surface morphology and composition of comet 67P.
Findings
Surface is lumpy with fractal roughness.
Surface likely consists of smooth, cracked plates.
No particles or pores visible at 0.8 mm resolution.
Abstract
After coming to rest on the night side of comet 67P/Churyumov-Gerasimenko, the ROLIS camera on-board Rosetta's Philae lander acquired five images of the surface below the lander, four of which were with the aid of LED illumination of different colors. The images confirm that Philae was perched on a sloped surface. A local horizon is visible in one corner of the image, beyond which we can see the coma. Having spent a full day on the surface Philae was commanded to lift and rotate, after which a final, sixth, LED image was acquired. The change in perspective allowed us to construct a shape model of the surface. The distance to the foreground was about 80 cm, much larger than the nominal 30 cm. This caused stray light, rather than directly reflected LED light, to dominate the image signal, complicating the analysis. The images show a lumpy surface with a roughness of apparently fractal…
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