Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....2157k&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #2157
Physics
Scientific paper
ANNEFRANK - ONE MORE REMINDER ABOUT PECULIARITIES OF LANDING ON A SMALL BODY G. G. Kochemasov, IGEM RAS, 35 Staromonetny, Moscow 119017, Russia, kochem@igem.ru, Fax: (007)(095) 230 21 79 The coming Rosetta mission is luckily aware once more on surprises which can be met at not yet closely examined small bodies. The tremendous success of the Stardust mission having acquired in November 2002 images of the main belt asteroid 5535Annefrank, allows scientists be sure that regularities of body shaping really exist. The knowledge of these rules does not make life of responsible for the mission easier [1]. A target is no more "a dirty snowball"[2]: it is a complexly built body with a rough cracked convex hemisphere and a squeezed spitting volatiles and dust concave one. Both sites are not ready candidates for safe probe landing. Moreover, compositions of two opposite sides must be different leaving an average comet composition "hidden". Densities of concave blocks are higher than densities of convex blocks because their radii are different (Theorem 4, [3]). This universal rule is clearly demonstrated in the 433Eros case: gravity is higher in the flattened middle and smaller at extended ends. The small (about 6 km long) dark asteroid Annefrank has the same shape peculiarities as about the same size friable comet Borrelli and 5 times longer stony Eros. All these bodies have different orbits, sizes, compositions but demonstrate remarkable shape similarities. It means that the planetary science at the beginning of XXI century stands ready for serious reevaluation of its bases. A new fundamental concept is: "Orbits make structures", which can be unfolded at 4 theorems of planetary tectonics [3]. Annefrank shows (Internet data) a convexo-concave shape with a huge "saddle" on the convex side (Theorem 1), a sharpened configuration with a very sharp and white end (Theorem 2) and hints of structural lines crossing its body and producing tectonic grains (Theorem 3). References: [1] Kochemasov G.G. (2002) Where to land a spacecraft probe on a comet? //Geophys. Res. Abstr., v. 4, (CD-ROM); [2] Kochemasov G.G. (2002) "Dirty snowball"- now is too primitive for a scientific description of comets // 34th COSPAR Scientific Assembly at the World Space Congress 2002, 10-19 Oct. 2002, Houston, Texas, USA, (CD-ROM); [3] Kochemasov G.G. (1999) Theorems of wave planetary tectonics // Geophys. Res. Abstr., v. 1, # 3, 700.
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