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Could G‐class asteroids be the parent bodies of the CM chondrites?
Author(s) -
BURBINE THOMAS H.
Publication year - 1998
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.1998.tb01630.x
Subject(s) - asteroid , chondrite , meteorite , geology , ordinary chondrite , astrobiology , parent body , feature (linguistics) , astrophysics , physics , linguistics , philosophy
— I review the dynamical and compositional evidence for possibly linking CM chondrites and asteroids having G‐class taxonomic designations. Three G asteroids have been identified through previous theoretical studies as being likely meteorite source bodies due to their locations near resonances. Two of these objects, 19 Fortuna and 13 Egeria, have spectral properties that are consistent with such a linkage with CM chondrites. Fortuna has a similar strength 0.7 μm absorption feature and near‐infrared spectral slope to CM chondrites but a weaker ultraviolet feature. Egeria also has the characteristic 0.7 μm feature of CM chondrite spectra but does not match as well in the near‐infrared. However, since the 0.7 μm feature is apparent in the spectra of approximately one‐half of measured C‐type asteroids, no definitive statement about any linkages can be made. Ceres is spectrally different from known meteorites in the 3 μm wavelength region and cannot be convincingly linked with any meteorite group.