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Approximation for attraction field of irregular celestial bodies using four massive points

Burov, Alexander A.; Guerman, Anna D.; Nikonova, Ekaterina A. +1 more

Approximation of the gravitational field of an irregular celestial body by the gravitational attraction field of four massive points is studied here in the framework of K-means method, known from the theory of pattern recognition. Using this approach, the simplified models for gravitational fields of asteroid (1620) Geographos and comet (67P) Chur…

The search campaign to identify and image the Philae Lander on the surface of comet 67P/Churyumov-Gerasimenko

Sierks, H.; Güttler, C.; Deller, J. +30 more

On the 12th of November 2014, the Rosetta Philae Lander descended to make the first soft touchdown on the surface of a comet - comet 67P/Churyumov-Gerasimenko. That soft touchdown did occur but due to the failure in the firing of its two harpoons, Philae bounced and travelled across the comet making contact with the surface twice more before final…