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1. Evidence for Surface Variegation in Rosetta OSIRIS Images of Asteroid 2867 Steins

Author

Schröder, S. E., Keller, H. U., Gutierrez, P., Hviid, S. F., Kramm, R., Sabolo, W., and Sierks, H.

Subjects
Astrophysics - Earth and Planetary Astrophysics
Abstract

The OSIRIS camera onboard Rosetta successfully acquired images of asteroid 2867 Steins through a variety of color filters during the flyby on 5 September 2008. The best images of this 5 km diameter asteroid have a resolution of 78 meters per pixel. We process the images by deconvolving with the point spread function and enlarging through the Mitchell-Netravali filter. The enhanced set is analyzed by means of various techniques (PCA, band ratios, stereo anaglyphs) to study surface morphology and search for variegation. We identify a landslide, which supports a YORP origin for Steins' unusual diamond shape. In addition, we find that the interior of one of two large craters on the south pole is bluer than the rest of the body., Comment: 17 pages, 9 figures

Published
2017
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2. Images of Asteroid 21 Lutetia: A Remnant Planetesimal from the Early Solar System

Author

Sierks, H., Lamy, P., Barbieri, C., Koschny, D., Rickman, H., Rodrigo, R., A'Hearn, M. F., Angrilli, F., Barucci, M. A., Bertaux, J.-L., Bertini, I., Besse, S., Carry, B., Cremonese, G., Da Deppo, V., Davidsson, B., Debei, S., De Cecco, M., De Leon, J., Ferri, F., Fornasier, S., Fulle, M., Hviid, S. F., Gaskell, R. W., Groussin, O., Gutierrez, P., Ip, W., Jorda, L., Kaasalainen, M., Keller, H. U., Knollenberg, J., Kramm, R., Kührt, E., Küppers, M., Lara, L., Lazzarin, M., Leyrat, C., Moreno, J. J. Lopez, Magrin, S., Marchi, S., Marzari, F., Massironi, M., Michalik, H., Moissl, R., Naletto, G., Preusker, F., Sabau, L., Sabolo, W., Scholten, F., Snodgrass, C., Thomas, N., Tubiana, C., Vernazza, P., Vincent, J.-B., Wenzel, K.-P., Andert, T., Pätzold, M., and Weiss, B. P.

Published
2011

3. E-Type Asteroid (2867) Steins as Imaged by OSIRIS on Board Rosetta

Author

Keller, H. U., Barbieri, C., Koschny, D., Lamy, P., Rickman, H., Rodrigo, R., Sierks, H., A'Hearn, M. F., Angrilli, F., Barucci, M. A., Bertaux, J.-L, Cremonese, G., Da Deppo, V., Davidsson, B., De Cecco, M., Debei, S., Fornasier, S., Fulle, M., Groussin, O., Gutierrez, P. J., Hviid, S. F., Ip, W.-H., Jorda, L., Knollenberg, J., Kramm, J. R., Kührt, E., Küppers, M., Lara, L.-M., Lazzarin, M., Moreno, J. Lopez, Marzari, F., Michalik, H., Naletto, G., Sabau, L., Wenzel, K.-P., Bertini, I., Besse, S., Ferri, F., Kaasalainen, M., Lowry, S., Marchi, S., Mottola, S., Sabolo, W., Schröder, S. E., Spjuth, S., and Vernazza, P.

Published
2010
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5. Overview of the Rosetta Fly-by of 21-Lutetia as Observed by the OSIRIS Camera System

Author

Hviid, Stubbe, Barbieri, C., Barucci, A. M., Bertini, I., Baglivo, L., Besse, S., Da Deppo, V., Debei, S., DeCecco, M., Ferri, F., Fornasier, S., Groussin, O., Gutiérrez, P. J., Jorda, L., Keller, H. U., Küppers, M., Leyrat, C., Lara, L., Lazzarin, M., De Leon, J., Magrin, S., Marchi, S., Massironi, M., Moissl, R., Sabolo, W., Schröder, S. E., Pertile, M., Sierks, H., Snodgrass, C., Thomas, N., Tubiana, C., Vincent, J., Vernazza, P., Zaccariotto, M., and OSIRIS Team

Abstract

On July 10th 2010 the ESA Rosetta spacecraft flew past the asteroid 21-Lutetia on the way to it's 2014 rendezvous with Comet 67P/Churyumov-Gerasimenko. The closest distance to the asteroid was 3160 km. During the fly-by the scientific camera system OSIRIS observed the asteroid. The resolved observations started 9hours 30min before the closest approach and finished 18 min after the closest approach. During this period the camera system acquired 234 images with the Narrow Angle Camera (NAC) and 228 images with the Wide Angle Camera (WAC). The highest resolution obtained on the surface was 59 m/pixel. 21-Lutetia is the largest asteroid yet visited by a spacecraft. The surface shows a highly impacted surface with the largest impact craters reaching 60km. The surface also shows evidence of thick regolith layers and grooves as previously seen on the moon Phobos. This paper will give an overview of the observations made by the OSIRIS cameras.

Published
2010

8. Overview of the Rosetta Fly-by of 21-Lutetia as Observed by the OSIRIS Camera System

Author

Hviid, Stubbe F., Barbieri, Cesare, Barucci, Maria Antonella, Bertini, Ivano, Baglivo, L., Besse, Sébastien, da Deppo, Vania, Debei, Stefano, de Cecco, M., Ferri, Francesca, Fornasier, Sonia, Groussin, Olivier, Gutierrez, Pedro J., Jorda, Laurent, Keller, Horst Uwe, Küppers, Michael, Leyrat, Cédric, Lara, Luisa M., Lazzarin, Monica, de Léon, J., Magrin, Sara, Marchi, Simone, Massironi, Matteo, Moissl, Richard, Sabolo, W., Schröder, S. E., Pertile, Marco, Sierks, Holger, Snodgrass, Colin, Thomas, Nicholas, Tubiana, Cecilia, Vincent, Jean-Baptiste, Vernazza, Pierre, Zaccariotto, Mirco, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2008

9. Rosetta Fly-by of Asteroid 2867 Steins: Phase Function from the OSIRIS Imaging System

Author

Hviid, Stubbe F., Fornasier, Sonia, Vernazza, Pierre, Sierks, Holger, Keller, Horst Uwe, Sabolo, W., Küppers, Michael, Ferri, Francesca, da Deppo, Vania, Barbieri, Cesare, Lamy, Philippe, Jorda, Laurent, Groussin, Olivier, Koschny, Detlef, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Pôle Planétologie du LESIA, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

International audience

Published
2008

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