NEO Colors from The Mission Accessible Near-Earth Object Survey (MANOS)
Nicholas Moskovitz, Theodore Kareta, Samantha Hemmelgarn, Hannah Zigo, Maxime Devog\`ele, Audrey Thirouin, Katie Breeland-Newcomb, Brian Burt, Annika Gustaffson, Mitchell Magnuson, Michael Mommert, David Polishook, Robert Schottland, Brian Skiff, Cristina Thomas, Mark Willman

TL;DR
This study provides spectro-photometric colors for 189 NEOs, revealing a size-dependent compositional trend that impacts impact risk assessment and our understanding of meteorite origins.
Contribution
It offers the first detailed analysis of color-based taxonomic distribution of NEOs as a function of size, highlighting a compositional gradient in the population.
Findings
Decrease in S complex NEOs with decreasing size.
Increase in X complex NEOs among smaller objects.
Size-dependent trend aligns with population models and meteorite studies.
Abstract
We present spectro-photometric griz colors for 189 near-Earth objects (NEOs) collected by the Mission Accessible Near-Earth Object Survey (MANOS). Data acquisition involved non-simultaneous multi-band exposures, thus particular attention was given to the influence of rotational lightcurves on the derived colors. We show that colors measured without accounting for lightcurve variations can significantly influence results for individual objects and potentially have systematic offsets for ensemble studies. Color-based taxonomic classifications were used to investigate the distribution of spectral types. Our results were combined with other visible wavelength surveys to highlight a previously reported change in the observed taxonomic distribution of NEOs as a function of size, namely a decrease in S complex and an increase in X complex objects with increasing absolute magnitude.…
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Taxonomy
TopicsAstro and Planetary Science · Planetary Science and Exploration · Astronomy and Astrophysical Research
