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Catalogue POP – Notice individuelle de publication

Keller Horst Uwe, Barbieri Cesare, Koschny Detlef, Lamy Philippe, Rickman Hans, Rodrigo Rafael, Sierks Holger, A'Hearn M. F., Angrilli Francesco, Barucci Maria Antonella, Bertaux Jean-Loup, Cremonese Gabriele, Da Deppo Vania, Davidsson Björn, De Cecco M., Debei Stefano, Fornasier Sonia, Fulle Marco, Groussin Olivier, Gutierrez Pedro J., Hviid Stubbe F., Ip W., Jorda Laurent, Knollenberg Jörg, Kramm Rainer, Kührt Ekkehard, Küppers Michael, Lara Luisa M., Lazzarin Monica, Moreno J. J. Lopez, Marzari Francesco, Michalik Harald, Naletto Giampiero, Sabau Lola, Thomas Nicholas, Wenzel Klaus-Peter, Bertini Ivano, Besse Sébastien, Ferri Francesca, Kaasalainen Mikko, Lowry Stephen, Marchi Simone, Mottola Stefano, Sabolo W., Schröder S. E., Spjuth S., Vernazza Pierre

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

Science, 2010, vol. 327, pp. 190-

Référence DOI : 10.1126/science.1179559
Référence ADS : 2010Sci...327..190K

Résumé :

The European Space Agency's Rosetta mission encountered the main-belt asteroid (2867) Steins while on its way to rendezvous with comet 67P/Churyumov-Gerasimenko. Images taken with the OSIRIS (optical, spectroscopic, and infrared remote<SUP> </SUP>imaging system) cameras on board Rosetta show that Steins is an oblate body with an effective spherical diameter of 5.3 kilometers. Its surface does not show color variations. The morphology of Steins is dominated by linear faults and a large 2.1-kilometer-diameter crater near its south pole. Crater counts reveal a distinct lack of small craters. Steins is not solid rock but a rubble pile and has a conical appearance that is probably the result of reshaping due to Yarkovsky-O'Keefe-Radzievskii-Paddack (YORP) spin-up. The OSIRIS images constitute direct evidence for the YORP effect on a main-belt asteroid.

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