The Nature of Low-Albedo Small Bodies from 3-$\mu$m Spectroscopy: One Group that Formed Within the Ammonia Snow Line and One that Formed Beyond It

Andrew S. Rivkin, Joshua P. Emery, Ellen S. Howell +9

We present evidence, via a large survey of 191 new spectra along with previously-published spectra, of a divide in the 3-$\mu$m spectral properties of the low-albedo asteroid populat…