Abstract
The planetary defense enterprise is justified by a cost/benefit analysis comparing long-term average losses from unmitigated NEO impacts to the expense of preventing them. Probabilistic risk assessment is used because the risk is dominated by NEOs that have not yet been discovered and are on unknown trajectories. The number of lives saved has historically quantified the benefit side, but there is no unambiguous means to compare this quantity to the monetary cost of planetary defense. Nevertheless, it is a useful metric for intercomparison of various risk-reduction strategies. There is a power-law distribution of NEO sizes, and the consequences are a strong function of size with a presumed threshold for global catastrophe. Therefore, the most cost-effective means for reducing risk has been to focus first on surveys designed to discover asteroids large enough to exceed the catastrophe threshold. The possibility of a NEO-caused global catastrophe has nearly been eliminated, reducing the overall assessed risk by an order of magnitude so far. Eliminating the remaining risk will be more difficult and the returned benefit will be smaller. Barring the discovery of an asteroid on a collision course, at some point the planetary defense cost will no longer be justified by the marginal benefit.
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Notes
- 1.
Based on private email communication with M. J. Rees on 21st June 2015.
References
Boslough, M., Barbara Jennings, Carvey, B., & Fogleman, W. (2015a). FEMA asteroid impact tabletop exercise simulations. In Proceedings of the 13th Hypervelocity Impact Symposium. https://ac.els-cdn.com/S1877705815006815/1-s2.0-S1877705815006815-main.pdf
Boslough, M., Brown, P., & Harris, A. (2015b). Updated population and risk assessment for airbursts from near-earth objects (NEOs). In 2015 IEEE Aerospace Conference (Vol. 2015–June, pp. 1–12). Big Sky, MT: IEEE. doi:10.1109/AERO.2015.7119288
Boslough, M., Chodas, P., Ezzedine, S., Jennings, B., & Fogleman, B. (2016). Physical and infrastructure modeling for the 2015 PDC asteroid threat exercise. In Aerospace Conference, 2016 IEEE (pp. 1–18). IEEE.
Brysse, K., Oreskes, N., O’Reilly, J., & Oppenheimer, M. (2013). Climate change prediction: Erring on the side of least drama? Global environmental change, 23(1), 327–337.
Chapman, C. R., & Morrison, D. (1994). Impacts on the Earth by asteroids and comets: assessing the hazard. Nature, 367(6458), 33–40. doi:10.1038/367033a0
Israelian, G., Eichler, D., & May, B. (Eds.). (2016). Starmus: Origins of the Cosmos. Tenerife, Spain.
Mathias, D. L., Wheeler, L. F., & Dotson, J. L. (2017). A probabilistic asteroid impact risk model: assessment of sub-300 m impacts. Icarus, 289, 106–119. doi:10.1016/j.icarus.2017.02.009
McKie, R. (2015). Asteroid Day tries to save life as we know it | Science | The Guardian. The Guardian. https://www.theguardian.com/science/2015/jun/13/asteroid-day-anniversary-tunguska-siberia. Accessed 7 April 2018
Reinhardt, J. C., Chen, X., Liu, W., Manchev, P., & Paté-Cornell, M. E. (2016). Asteroid Risk Assessment: A Probabilistic Approach. Risk Analysis, 36(2), 244–261. doi:10.1111/risa.12453
Rumpf, C. M., Lewis, H. G., & Atkinson, P. M. (2017). Asteroid impact effects and their immediate hazards for human populations. Geophysical Research Letters, 44(8), 3433–3440. doi:10.1002/2017GL073191
Stokes, G. H., Barbee, B. W., Bottke, W. F., Buie, M. W., Chesley, S. R., Chodas, P. W., et al. (2017). Update to determine the feasibility of enhancing the search and characterization of NEOs. In Technical Report. Prepared by the Near-Earth Object Science Definition Team at the request of the National Aeronautics and Space Administration. https://www.nasa.gov/sites/default/files/atoms/files/2017_neo_sdt_final_e-version.pdf
Toon, O. B., Zahnle, K., Morrison, D., Turco, R. P., & Covey, C. (1997). Environmental perturbations caused by the impacts of asteroids and comets. Reviews of Geophysics, 35(1), 41–78. doi:10.1029/96RG03038
Weissman, P. (1994). The comet and asteroid impact hazard in perspective. In T. Gehrels (Ed.), Hazards Due to Comets and Asteroids (pp. 1191–1212). University of Arizona Press.
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Boslough, M. (2019). Uncertainty and Risk at the Catastrophe Threshold. In: Schmidt, N. (eds) Planetary Defense. Space and Society. Springer, Cham. https://doi.org/10.1007/978-3-030-01000-3_13
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