Role of spectral resolution for infrared asteroid compositional analysis using meteorite spectra

Abstract

In this work the potential mineral identification of meteorites is analysed for the mid-infrared range, to evaluate observational possibilities for future missions targeting small body surfaces. Three carbonaceous and three ordinary chondrite meteorites are examined by a diffuse reflection (DRIFT) instrument, and the presence of principal minerals is confirmed by a powder diffraction method as well. The possibilities and constraints of mineral identifications in the mid-infrared are simulated by artificially degrading the spectral resolution. Our research shows that for the definite identification of principal mineral bands, a spectral resolution $\le 10$~cm${}^{-1}$ ($\le 0.15\mu$m) is needed. At 20-100~cm${}^{-1}$ (0.3 - 1.5~$\mu$m) resolution the identification of these minerals is uncertain, and with a resolution $>100$~cm${}^{-1}$, it is almost impossible.

Accepted in MNRAS for publication on May 22nd, 2020; 7 pages, 3 figures

References in corpus (7)

• The OSIRIS-REx Thermal Emission Spectrometer (OTES) Instrument
• On the Verge of an Astronomy CubeSat Revolution
• UV to far-IR reflectance spectra of carbonaceous chondrites. I. Implications for remote characterization of dark primitive asteroids targeted by sample-return missions
• Tidal disruption of NEAs - a case of Příbram
• On the origin of the Almahata-Sitta meteorite and 2008TC3 asteroid
• The Geminid meteoroid stream as a potential meteorite dropper: a case study
• THERMAP: a mid-infrared spectro-imager for space missions to small bodies in the inner solar system