Analysis of the First Disk-resolved Images of Ceres from Ultraviolet Observations with the Hubble Space Telescope

  title={Analysis of the First Disk-resolved Images of Ceres from Ultraviolet Observations with the Hubble Space Telescope},
  author={Joel Wm. Parker and Sharon A. Stern and Peter C. Thomas and Michel C. Festou and William J. Merline and Eliot F. Young and Richard P. Binzel and Larry Allen Lebofsky},
  journal={The Astronomical Journal},
  pages={549 - 557}
We present Hubble Space Telescope Faint Object Camera observations of the asteroid 1 Ceres at near-, mid-, and far-UV wavelengths (λ = 3636, 2795, and 1621 Å, respectively) obtained on 1995 June 25. The disk of Ceres is well resolved for the first time, at a scale of ∼50 km. We report the detection of a large, ∼250 km diameter surface feature for which we propose the name "Piazzi"; however, it is presently uncertain whether this feature is due to a crater, albedo variegation, or other effect… 
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