An Argument for a Kilometer-Scale Nucleus of C/2019 Q4

Abstract

C/2019 Q4 (Borisov), discovered by Gennady Borisov on August 30, 2019, is tentatively an interstellar comet. We show that a kilometer-scale nucleus would provide consistency with both `Oumuamua and CNEOS-2014-01-08, resulting in a single power-law distribution with an equal amount of mass per logarithmic bin of interstellar objects.

arXiv commentAccepted for publication on Sep 16 (2019)