understanding the outer Solar System

The discoveries OSSOS makes can be used to understand many different aspects of the outer Solar System. Our research focusses both on the physical properties of the objects and on what can be understood from where they orbit.


Using resonant KBOs discovered by OSSOS to test theoretical models of the dynamical sculpting of the outer solar system. Constrain contributions to the resonant population from: planetesimal-driven migration chaotic capture/damping of an eccentric Neptune scattering + temporary resonance sticking Measure the de-biased relative populations of different resonances Measure the internal dynamical structure of resonances Convert dynamical theories of Kuiper belt sculpting into observational diagnostics and apply them to OSSOS data


identify TNOs which have widely-separated satellites or binary companions, as well as identify a subset of TNOs which merit high angular-resolution follow up observations to identify tighter companions. Increase the sample of known wide binaries in the Cold Classical Kuiper Belt by perhaps a factor of two, refine the mutual orbit distribution of this population. Limit the fraction of wide binaries in the resonant populations, especially at low inclination. Perform high angular-resolution observations of a carefully selected subset of the OSSOS objects to identify or refine trends of binarity with (a) binary separation (b) primary radius (or as a proxy, H magnitude) and (c) dynamical class.


Light curves

Scattering objects


Classical Belt

Cometary Activity


Nearby objects

Thermal modelling