The Red Edge Problem in asteroid band parameter analysis

• DOI: 10.1111/maps.12611
• Publication Date: 2016-03-23T04:47:29Z
• Authors: Sean S. Lindsay; Tasha L. Dunn; Joshua P. Emery; Neil E. Bowles
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract Near‐infrared reflectance spectra of S‐type asteroids contain two absorptions at 1 and 2 μm (band I II ) that are diagnostic mineralogy. A parameterization these bands is frequently employed to determine the mineralogy S( IV through use ordinary chondrite calibration equations link band parameters. The most widely used study uses a Band terminal wavelength point (red edge) 2.50 μm. However, due limitations NIR detectors on prominent telescopes in asteroid research, spectral data for typically only reliable out 2.45 We refer this discrepancy as “The Red Edge Problem.” In report, we evaluate associated errors measured area ratios ( BAR = Area BII / BI calculated relative abundance measurements. find Problem often not dominant source error observationally limited red edge set μm, but it 2.40 error, however, one sided therefore systematic. As such, provide adjust s values with different definition. also new ol/(ol+px) edges