Compositional variation on the surface of Centaur 8405 Asbolus

S. D. Kern, D. W. Mccarthy, M. W. Buie, R. H. Brown, H. Campins, M. Rieke

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Near-infrared 1-2 μm spectra of the Centaur 8405 Asbolus (1995 GO) have been obtained using the Hubble Space Telescope near-infrared camera and multiobject spectrometer. Strong and variable absorption features indicate a significantly inhomogeneous surface characterized by water ice mixed with additional unknown constituents. Over a 1.7 hr interval, the observed spectra varied from a nearly featureless spectrum to a very complicated absorption spectrum, and the integrated flux varied in a manner consistent with previous light-curve observations. The accepted rotation period of 8.9351 hr assumes a shape-dominated light curve. Our observations indicate that the light curve may in fact be dominated by a relatively bright spot with a period of 4.47 hr, i.e., half the previous value.

Original languageEnglish (US)
Pages (from-to)L155-L159
JournalAstrophysical Journal
Volume542
Issue number2 PART 2
DOIs
StatePublished - Oct 20 2000

Keywords

  • Infrared: solar system
  • Kuiper Belt
  • Oort Cloud

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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