Infrared spectral observations of asteroid 4 Vesta

Harold P. Larson, Uwe Fink

Research output: Contribution to journalArticlepeer-review

66 Scopus citations


An ir spectrum of asteroid Vesta, the first of any asteroid, has been recorded at a spectral resolution of 44 cm-1 with a Fourier spectrometer. An electronic absorption band is observed that is assigned to an iron-rich pyroxene (pigeonite) spectroscopically similar to that found in certain eucrites. Other important rock-forming minerals such as olivine and plagioclase feldspar are not observed. There is no evidence for compositional variation with rotational phase angle. This spectroscopic picture of Vesta suggests considerable evolution including the melting and differentiation of silicates.

Original languageEnglish (US)
Pages (from-to)420-427
Number of pages8
Issue number4
StatePublished - Dec 1975

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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