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Planetary Defense Conference Exercise - 2017

This webpage does not describe a real potential asteroid impact. The information on this page is fictional and provided only to support an emergency response exercise conducted during the International Academy of Astronautics (IAA) 2017 Planetary Defense Conference in Tokyo, Japan, May 15-19, 2017. This is only an exercise.

The 2017 PDC Hypothetical Asteroid Impact Scenario, Day 1: May 15, 2017


Threat Discovery and Characterization Working Group
Campaign Design Working Group
Decision to Act Working Group
Impact Effects Working Group
Deflection and Disruption Working Group
Disaster Planning & Management Working Group
Communication Working Group
Leaders Working Group

Decision to Act

  1. It is recommended to use all means to obtain better information on the impact probability and size of the object. The most suitable telescopes, including the HST, should be used. Political support from e.g. the UN should be sought to give observations of this object the highest priority.

  2. As foreseen by IAWN and SMPAG a warning of the potential impact should be issued by IAWN and the assessemnt of options for a potential space mission shall be started by SMPAG and other entities in close cooperation with SMPAG. This option assessment shall address a deflection mission and a characterisation mission.

  3. For a 1% chance of impact it is not recommended to start real preparations of a space mission.



  • Background information on the scenario.
  • To study this scenario using the JPL HORIZONS system, click here.
  • Description of NASA/JPL NEO Deflection App.
  • Using the Deflection App for the PDC 2015 scenario.