The NEO (175706) 1996 FG3 in the 2-4μm spectral region: Evidence for an aqueously altered surface

Andrew S. Rivkin, Ellen S. Howell, Ronald J. Vervack, Chris Magri, Michael C. Nolan, Yan R. Fernandez, Andrew F. Cheng, M. Antonietta Barucci, Patrick Michel

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

We present observations of the binary near-Earth Asteroid (175706) 1996 FG3 in the 2-4. μm spectral region, obtained on multiple nights using the SpeX instrument on the NASA Infrared Telescope Facility (IRTF). We find evidence for an absorption band of ~5-10% (depending on the night and details of continuum choice), diagnostic for hydrated/hydroxylated minerals on the asteroid surface. This demonstrates that the optical surface of 1996 FG3 has not been heated to dehydrating temperatures. Sample-return missions targeting 1996 FG3 will likely find relatively fresh areas for sampling.

Original languageEnglish (US)
Pages (from-to)493-498
Number of pages6
JournalIcarus
Volume223
Issue number1
DOIs
StatePublished - Mar 2013
Externally publishedYes

Keywords

  • Asteroids
  • Asteroids, Composition
  • Asteroids, Surfaces
  • Spectroscopy

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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