Palomar Optical Spectrum of Hyperbolic Near-Earth Object A/2017 U1

Abstract

We present optical spectroscopy of the recently discovered hyperbolic near-Earth object A/2017 U1, taken on 25 Oct 2017 at Palomar Observatory. Although our data are at a very low signal-to-noise, they indicate a very red surface at optical wavelengths without significant absorption features.

updated in response to referee comments

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