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24 April 2024 |
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A plausible link between the asteroid 21 Lutetia and CH carbonaceous chondrites | | Carles E. Moyano-Cambero
; Josep M. Trigo-Rodríguez
; Jordi Llorca
; Sonia Fornasier
; Maria A. Barucci
; Albert Rimola
; | | Date: |
5 Jul 2016 | | Abstract: | A crucial topic in planetology research is establishing links between
primitive meteorites and their parent asteroids. In this study we investigate
the feasibility of a connection between asteroids similar to 21 Lutetia,
encountered by the Rosetta mission in July 2010, and the CH3 carbonaceous
chondrite Pecora Escarpment 91467 (PCA 91467). Several spectra of this
meteorite were acquired in the ultraviolet to near-infrared (0.3 to 2.2 {mu}m)
and in the mid-infrared to thermal infrared (2.5 to 30.0 {mu}m or 4000 to ~333
cm^-1), and they are compared here to spectra from the asteroid 21 Lutetia.
There are several similarities in absorption bands and overall spectral
behavior between this CH3 meteorite and 21 Lutetia. Considering also that the
bulk density of Lutetia is similar to that of CH chondrites, we suggest that
this asteroid could be similar, or related to, the parent body of these
meteorites, if not the parent body itself. However, the apparent surface
diversity of Lutetia pointed out in previous studies indicates that it could
simultaneously be related to other types of chondrites. Future discovery of
additional unweathered CH chondrites could provide deeper insight in the
possible connection between this family of metal-rich carbonaceous chondrites
and 21 Lutetia or other featureless, possibly hydrated high-albedo asteroids. | | Source: | arXiv, 1607.1253 | | Services: | Forum | Review | PDF | Favorites | |
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