Lect4 Gaffey AstII (10-01-09)

Lect4 Gaffey AstII (10-01-09) - Reflectance Spectroscopy...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Reflectance Spectroscopy and Asteroid Surface Mineralogy Michael J. Gaffey, Jeffrey F. Bell and Dale P. Cruikshank Asteroids II (1989) Outline of Gaffey et al. Asteroids II I. Mineralogical Information in Reflectance Spectra II. General Classes of Asteroid Spectral Ref. Data III. Analysis of Asteroid Reflectance Spectra IV. Asteroid Surface Material Characterization V. The Present Asteroid Population as Meteorite Source Bodies VI. Asteroid Perspectives on the Early Solar System VII. Future Directions VIII.Summary Gaffey et al.AsteroidsII I. Mineralogical Information in Reflectance Spectra Intro Absorption and emission of light Why do asteroid observers use primarily the 0.3 to 2.5 micron region? Gaffey et al.AsteroidsII I. Mineralogical Information in Reflectance Spectra Intro Absorption and emission of light Why do asteroid observers use primarily the 0.3 to 2.5 micron region? Peak of incident sunlight Atmospheric transmission Low thermal background Example: 0.8-2.5 m spectra of comet and D asteroid 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 944 Hidalgo 162P/Siding Spring Thermal component in spectrum of 162P 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 1.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 944 Hidalgo 162P/Siding Spring Thermal component in spectrum of 162P R 944 = 2.1 AU R 162P = 1.2 AU Example: 0.8-2.5 m spectra of comet and D asteroid Gaffey et al.AsteroidsII I. Mineralogical Information in Reflectance Spectra Intro Electronic Absorption features: mainly due to Fe and other metals in crystals. Used to: identify minerals, metals in those minerals and their abundances, tells us about the chemical and physical history of the minerals Can sometimes help identify organic molecules Less diagnostic of metals (Figure 1a) and carbonaceous material (Fig. 2Ae) I. Mineralogical Information in Reflectance Spectra Intro Electronic Absorption features: mainly due to Fe and other metals in crystals. Used to: identify minerals, metals in those minerals and their abundances, tells us about the chemical and physical history of the minerals Can sometimes help identify organic molecules Less diagnostic of metals (Figure 1a) and carbonaceous material (Fig. 2Ae) Spectrum of asteroid 24 Themis (from Campins et al....
View Full Document

This note was uploaded on 11/09/2009 for the course AST 4142 taught by Professor Campins during the Fall '09 term at University of Central Florida.

Page1 / 32

Lect4 Gaffey AstII (10-01-09) - Reflectance Spectroscopy...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online