We review the evidence for buried ice in the asteroid belt; specifically the questions around
the so-called Main Belt Comets (MBCs). We summarise the evidence for water throughout …

Some asteroids eject dust, unexpectedly producing transient, comet-like comae and tails.
First ascribed to the sublimation of near-surface water ice, mass-losing asteroids (also …

In this review presented at the Royal Society meeting,'Cometary science after Rosetta', I
present an overview of studies of small solar system objects that exhibit properties of both …

The practical distinctions between asteroids and comets, viewed as products of accretion on
either side of the snow line, are less clear-cut than previously understood. In this chapter, we …

We have discovered two epochs of activity on quasi-Hilda 2009 DQ 118. Small bodies that
display comet-like activity, such as active asteroids and active quasi-Hildas, are important for …

We report that object 282P/(323137) 2003 BM 80 is undergoing a sustained activity outburst,
lasting over 15 months thus far. These findings stem in part from our NASA Partner Citizen …

We present archival observations of main-belt asteroid (248370) 2005 QN 173 (also
designated 433P) that demonstrate this recently discovered active asteroid (a body with a …

Some asteroids eject dust, producing transient, comet-like comae and tails; these are the
active asteroids. The causes of activity in this newly identified population are many and …

On 2019 January 5 a streamer associated with the 4–10 km main belt asteroid (6478) Gault
was detected by the ATLAS sky survey, a rare discovery of activity around a main belt …

Active asteroids behave dynamically like asteroids but display comet-like comae. These
objects are poorly understood, with only about 30 identified to date. We have conducted one …