Probabilistic modeling of asteroid diameters from Gaia DR2 errors
arXiv:2108.11814 · doi:10.3847/2515-5172/ac205e
Abstract
The Gaia Data Release 2 provides precise astrometry for nearly 1.5 billion sources across the entire sky, including several thousand asteroids. In this work, we provide evidence that reasonably large asteroids (diameter 20 km) have high correlations with Gaia relative flux uncertainties and systematic right ascension errors. We further capture these correlations using a logistic Bayesian additive regression tree model. We compile a small list of probable large asteroids that can be targeted for direct diameter measurements and shape reconstruction.
arXiv comment3 pages, 1 figure, accepted for publication at Research Notes of the AAS
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