Earth, Moon, and Planets

, Volume 101, Issue 1–2, pp 65–91 | Cite as

Dawn Mission to Vesta and Ceres

Symbiosis between Terrestrial Observations and Robotic Exploration
  • C. T. Russell
  • F. Capaccioni
  • A. Coradini
  • M. C. De Sanctis
  • W. C. Feldman
  • R. Jaumann
  • H. U. Keller
  • T. B. McCord
  • L. A. McFadden
  • S. Mottola
  • C. M. Pieters
  • T. H. Prettyman
  • C. A. Raymond
  • M. V. Sykes
  • D. E. Smith
  • M. T. Zuber
Article

Abstract

The initial exploration of any planetary object requires a careful mission design guided by our knowledge of that object as gained by terrestrial observers. This process is very evident in the development of the Dawn mission to the minor planets 1 Ceres and 4 Vesta. This mission was designed to verify the basaltic nature of Vesta inferred both from its reflectance spectrum and from the composition of the howardite, eucrite and diogenite meteorites believed to have originated on Vesta. Hubble Space Telescope observations have determined Vesta’s size and shape, which, together with masses inferred from gravitational perturbations, have provided estimates of its density. These investigations have enabled the Dawn team to choose the appropriate instrumentation and to design its orbital operations at Vesta. Until recently Ceres has remained more of an enigma. Adaptive-optics and HST observations now have provided data from which we can begin to confidently plan the mission. These observations reveal a rotationally symmetric body with little surface relief, an ultraviolet bright point that can be used as a control point for determining the pole and anchoring a geographic coordinate system. They also reveal albedo and color variations that provide tantalizing hints of surface processes.

Keywords

Dawn Discovery mission Asteroids Ceres Vesta 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • C. T. Russell
    • 1
  • F. Capaccioni
    • 2
  • A. Coradini
    • 3
  • M. C. De Sanctis
    • 4
  • W. C. Feldman
    • 5
  • R. Jaumann
    • 6
  • H. U. Keller
    • 7
  • T. B. McCord
    • 8
  • L. A. McFadden
    • 9
  • S. Mottola
    • 6
  • C. M. Pieters
    • 10
  • T. H. Prettyman
    • 5
  • C. A. Raymond
    • 11
  • M. V. Sykes
    • 12
  • D. E. Smith
    • 13
  • M. T. Zuber
    • 14
  1. 1.IGPP & ESS, UCLALos AngelesUSA
  2. 2.INAFRomeItaly
  3. 3.IFSIRomeItaly
  4. 4.IAFSRomeItaly
  5. 5.LANLLos AlamosUSA
  6. 6.DLR Rutherfordstr 2BerlinGermany
  7. 7.MPAEKatlenburg-LindauGermany
  8. 8.University of HawaiiHonoluluUSA
  9. 9.University of MarylandCollege ParkUSA
  10. 10.Brown UniversityProvidenceUSA
  11. 11.JPLPasadenaUSA
  12. 12.PSITucsonUSA
  13. 13.GSFCGreenbeltUSA
  14. 14.MITCambridgeUSA

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