EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Peculiar Comets Ejected Early In Solar System Formation

Sarah E. Anderson1, Jean-Marc Petit1, Benoît Noyelles1, Olivier Mousis2, and Philippe Rousselot1
Sarah E. Anderson et al.
  • 1Institut UTINAM UMR 6213, CNRS, Univ. Bourgogne Franche-Comté, OSU THETA, BP 1615, 25010 Besançon Cedex, France (
  • 2Aix Marseille Université, CNRS, CNES, LAM, Marseille, France.

Comet C/2016 R2 PanSTARRS presents an unusually high N2/CO abundance ratio, as well as a heavy depletion in H2O, making it the only known comet to have this composition. Two studies have independently estimated the possible origin of this comet from building blocks formed in a peculiar region in the protoplanetary disk, near the ice line of CO and N2. Here we explore the potential fates of comets formed from these building blocks using a numerical simulation of early solar system formation and tracking the dynamics of these objects in the Jumping Neptune scenario. We find that objects formed in the region of the CO- and N2- icelines a are highly likely to be sent towards the Oort Cloud or ejected from the Solar System altogether on a relatively short timescale, thus offering a potential explanation for the scarcity of comets with R2’s unique composition.  

How to cite: Anderson, S. E., Petit, J.-M., Noyelles, B., Mousis, O., and Rousselot, P.: Peculiar Comets Ejected Early In Solar System Formation, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-7975,, 2022.

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