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Nucleus and Mass Loss from Active Asteroid 313P/Gibbs

Mutchler, Max; Jewitt, David; Agarwal, Jessica +3 more

We present Hubble Space Telescope observations of active asteroid 313P/Gibbs (formerly P/2014 S4) taken over the five month interval from 2014 October to 2015 March. This object has been recurrently active near perihelion (at 2.4 AU) in two different orbits, a property that is naturally explained by the sublimation of near surface ice but which is…