Asteroid impacts are crucial events for the evolution of Earth. Asteroids and comets may have transported some of the ingredients of life (water and organic molecules from the outer solar system to our planet. At the same time, there is strong evidence that impacts destroyed much of the life on earth multiple times. The last and most famous event is the impact of an order of 10 km sized object that led to the extinction of dinosaurs, 65 million years ago. Those big impacts are rare, however, much smaller events can create large damage. The estimated age of Meteor Crater in Arizona, an impact crater of approximately 1.2 km in diameter, is only 50000 years. Only a century ago, in the Tunguska event on 30 June 1908, a small asteroid exploded in the atmosphere above Siberia and destroyed more than 2000 km2 of Forest. And very recently, in 2013, the impact of an only ~20 m asteroid damaged a large number of buildings in the Russian town of Chelyabinsk, luckily killing nobody, but injuring more than 1500 people. The question is not if another asteroid will get on a collision trajectory, but when it will happen.
For the first time in history, humankind is becoming able to prevent a catastrophic asteroid impact. Search programs are nearly complete for km-sized near-earth asteroids, and are striving to reach completeness for 100m-sized objects in the next years. Deflection of hazardous asteroids is in reach with current technology. In the International AIDA cooperation, NASA’s DART mission is in development for launch in 2021 for a deflection demonstration of asteroid Didymos in 2022. ESA’s Hera spacecraft, currently under study, is expected to follow on to study the impact effect in 2026.
Abstracts are invited covering all aspects of planetary defense: Search programs for near-earth asteroids, dynamical and physical characterization of potentially hazardous objects, theoretical studies of potential deflection methods, and all components of deflection missions.

Convener: Michael Küppers | Co-conveners: Özgür Karatekin, Patrick Michel
| Attendance Fri, 12 Apr, 14:00–15:45
Hall X4

Attendance time: Friday, 12 April 2019, 14:00–15:45 | Hall X4

Chairperson: Michael Küppers
X4.162 |
| Highlight
SVO-ast: A citizen-science project to identify NEAs and Mars crossers using the Virtual Observatory
Enrique Solano, Carlos Rodrigo, and Almudena Velasco
X4.163 |
Cecilia Tubiana, Stefan Ulamec, Carsten Güttler, Özgür Karatekin, Naomi Murdoch, Patrick Michel, Michael Küppers, and Ian Carnelli and the HERA WG4
X4.164 |
Thomas I. Maindl and Christoph M. Schäfer
X4.165 |
Max Mahlke, Enrique Solano, Jerome Berthier, Benoit Carry, Bruno Merín, and Elena Racero
X4.166 |
| solicited
Alessandra Migliorini, Giuseppe Piccioni, Fabrizio Capaccioni, Maria Cristina De Sanctis, Federico Tosi, Vincenzo Della Corte, Francesca Altieri, and Maria Teresa Capria
X4.167 |
| solicited
| Highlight
Kleomenis Tsiganis, Michael Kueppers, Patrick Michel, Ian Carnelli, Stephan Ulamec, and Andy Cheng and the Hera Team
X4.168 |
Hannah Goldberg and Özgür Karatekin
X4.169 |
Igor Gai, Marco Zannoni, Dario Modenini, Paolo Tortora, Simone Pirrotta, and Valerio Di Tana
X4.170 |
Teodor Stefanut, Victor Bacu, Constantin Nandra, Denisa Copandean, Dorian Gorgan, and Ovidiu Vaduvescu
X4.171 |
Simone Pirrotta, Simone Simonetti, Valerio Di Tana, Biagio Cotugno, Marilena Amoroso, Elisabetta Dotto, Elena Mazzotta Epifani, Vincenzo Della Corte, Michèle Lavagna, Andrea Capannolo, Vincenzo Pesce, Igor Gai, Paolo Tortora, and Marco Zannoni
X4.172 |
Giovanni Zanotti, Michèle Lavagna, and Capannolo Capannolo