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Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros

Author

Listed:
  • P. C. Thomas

    (Center for Radiophysics and Space Research, Cornell University)

  • J. Veverka

    (Center for Radiophysics and Space Research, Cornell University)

  • M. S. Robinson

    (Northwestern University)

  • S. Murchie

    (Applied Physics Laboratory, Johns Hopkins University)

Abstract

The loose material—regolith—on the surfaces of asteroids is thought to represent ballistically emplaced ejecta from impacts1,2 but the identification of source craters and the detailed study of the regolith modification have been hampered by the limited spatial resolution and area coverage of the few asteroids imaged by spacecraft. Here we report the results of global mapping of the asteroid 433 Eros from high-resolution images obtained by the NEAR-Shoemaker spacecraft. Based on the images and ejecta-emplacement models, we suggest that most large ejecta blocks on Eros originate from a relatively young 7.6-km-diameter crater. A large fraction of the ejecta from impacts pre-dating that crater has apparently been buried or eroded. The images also show evidence for the action of a variety of sorting environments for regolith particles after they are deposited on the surface.

Suggested Citation

  • P. C. Thomas & J. Veverka & M. S. Robinson & S. Murchie, 2001. "Shoemaker crater as the source of most ejecta blocks on the asteroid 433 Eros," Nature, Nature, vol. 413(6854), pages 394-396, September.
    • Handle: RePEc:nat:nature:v:413:y:2001:i:6854:d:10.1038_35096513
    DOI: 10.1038/35096513
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    Cited by:

    1. M. Pajola & F. Tusberti & A. Lucchetti & O. Barnouin & S. Cambioni & C. M. Ernst & E. Dotto & R. T. Daly & G. Poggiali & M. Hirabayashi & R. Nakano & E. Mazzotta Epifani & N. L. Chabot & V. Corte & A., 2024. "Evidence for multi-fragmentation and mass shedding of boulders on rubble-pile binary asteroid system (65803) Didymos," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    2. Olivier Barnouin & Ronald-Louis Ballouz & Simone Marchi & Jean-Baptiste Vincent & Harrison Agrusa & Yun Zhang & Carolyn M. Ernst & Maurizio Pajola & Filippo Tusberti & Alice Lucchetti & R. Terik Daly , 2024. "The geology and evolution of the Near-Earth binary asteroid system (65803) Didymos," Nature Communications, Nature, vol. 15(1), pages 1-14, December.

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