[BAA Comets] Nucleus and Mass Loss from Active Asteroid 313P/Gibbs

[Jeremy Shears]

.....by David Jewitt, Jing Li, Jessica Agarwal, Harold Weaver, Max Mutchler, Stephen Larson. An AJ pre-print at http://arxiv.org/abs/1507.01983
They note that  this object is "recurrently active near perihelion (at 2.4 AU).......a property that is naturally explained by the sublimation of near surface ice" and that this activity "is consistent with sublimation from an ice patch shadowed by local topography, for example in a pit like those observed on the nuclei of short-period comet 67P/Churyumov-Gerasimenko".
Whilst writing, I note there is another paper on "High precision comet trajectory estimates: the Mars flyby of C/2013 A1 (Siding Spring)" at http://arxiv.org/abs/1507.01980
Go well!Jeremy