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Scorus, czy o możliwości powstania Ceres w zewnętrznym Układzie Słonecznym a potem migracji do Pasa Planetoid ktoś już na poważnie rozmawiał?
We have shown here that the altered CM and CI carbonaceous chondrites do not offer a good spectral match for Ceres, nor do all carbonaceous chondrites show evidence of exposure to significant amounts of ammonia. Therefore, it seems unlikely that a substantial population of ammonia-rich planetesimals could have formed locally at Ceres’ current location in the main belt, even if the water snow line episodically migrated about 1 au during the evolution of the protoplanetary disk22–24. However, it is possible that Ceres grew close to its present position by accreting pebble-sized objects, some of which could have drifted inward from larger heliocentric distances25 where ammonia was stable. If the source of NH3 for ammoniated phyllosilicate wasammonia-bearing organic matter, Ceres could have accreted organics originally formed by irradiation of N2 ices condensed near or beyond the orbit of Neptune.Alternatively, Ceres may itself have formed further out in the Solar System, presumably in the trans-Neptunian disk, before being subsequently implanted in the main belt26. This view is corroborated by the presence of ammonia ice on other large trans-Neptunian objects, such as Orcus and Charon27,28. The implantation of Ceres in the main belt could have taken place during a migratory phase of the giant planets, either during their growth in the protoplanetary disk29, or at a later time as a result of an orbital instability30.
Czy Ceres się mocno różni od pozostałych planetoid w tym Pasie?