Faculty Directory

Planetary Defense (defense against hazardous asteroid and comet impacts on Earth), astrodynamics, dynamical systems, combinatorial optimization, grid computing & distributed/parallel processing, numerical methods, simulation & modeling, spacecraft trajectory design/optimization, rendezvous & proximity operations, interplanetary trajectory/mission design, near-Earth asteroid accessibility for human and robotic missions.

Books / Book Chapters

• Barbee, B. W., Planetary Defense Activities Beyond NASA and  ESA. In Legal Aspects of Planetary Defence. (pp. 92-106) Ed. Irmgard Marboe. Leiden, The Netherlands: Brill/Nijhoff, 2021, https://brill.com/view/title/60542
• Abell, P.A., Barbee, B. W., Chodas, P. W., Kawaguchi, J., Landis, R. R., Mazanek, D. D., and Michel, P., Human Exploration of Near-Earth Asteroids. In Asteroids IV (pp. 855-880). Ed. P. Michel, F. E. DeMeo, W. F. Bottke, Tucson, AZ: The University of Arizona Press, 2015, https://uapress.arizona.edu/book/asteroids-iv

Policy Documents, Technical Reports, etc.

• Lead Author of Goal 3: Develop Technologies for NEO Deflection and Disruption Missions in the US National  Near-Earth Object Preparedness Strategy and Action Plan by the National Science & Technology Council. (2018)
• Member of the 2017 NASA Near-Earth Object (NEO) Science Definition Team (SDT) and contributing author in Stokes, et al., Update to Determine the Feasibility of Enhancing the Search and Characterization of NEOs. (2017)
• Contributing Author to Goal 2: Defend Planet Earth and Goal 3: Enable Human Exploration in the 2016 NASA Small Bodies Assessment Group (SBAG) Goals Document
• Wie, B., Barbee, B. W.,  Pitz, A., Kaplinger, B., Hawkins, M., Winkler, T., Premaratne, P., Wagner, S., Vardaxis, G., Lyzhoft, Zimmerman, B., An Innovative Solution to NASA's NEO Impact Threat Mitigation Grand Challenge and Flight Validation Mission Architecture Development, Final Technical Report of a NIAC Phase 2 Study, December 9, 2014
• Barbee, B. W., ed., Target NEO 2: Open Global Community NEO Workshop Report. 2013. downloadable from URL http://targetneo.jhuapl.edu
• Barbee, B. W., ed., Target NEO: Open Global Community NEO Workshop Report. 2011. downloadable from URL http://targetneo.jhuapl.edu/archives/2011.php
• Contributing Author to NASA's On-Orbit Satellite Servicing Study Project Report. (2010)

Journal Articles

• Richardson, D. C., Agrusa, H., Barbee, B., et al. The Dynamical State of the Didymos System Before and After the DART Impact. The Planetary Science Journal, American Astronomical Society. Vol. 5, No. 8, Aug. 2024, doi: https://doi.org/10.3847/PSJ/ad62f5
• Raducan, S.D., Jutzi, M., Cheng, A.F., Zhang, Y., Barnouin, O., Collins, G. S., Daly, R. T., Davison, T. M., Ernst, C. M., Farnham, T. L., Ferrari, F., Hirabayashi, M., Kumamoto, K. M., Michel, P., Murdoch, N., Nakano, R., Pajola, M., Rossi, A., Agrusa, H. F., Barbee, B. W., et al. Physical properties of asteroid Dimorphos as derived from the DART impact. Nature Astronomy 8, 445–455 (2024). https://doi.org/10.1038/s41550-024-02200-3 
• Buys, M., Squirini, R. M., Wilson, C. M., Gabriel, J. L., Salehuddin, H., Zimmerman, G. K., Barbee, B. W., THEO & MUFN: Defending Earth against the 2023 PDC hypothetical asteroid impact, Acta Astronautica, Vol. 215, pp. 217-233, 2024, doi: https://doi.org/10.1016/j.actaastro.2023.11.032 
• Cheng,  A. F. , Agrusa, H. F., Barbee, B. W. et al. Momentum Transfer from the DART Mission Kinetic Impact on Asteroid Dimorphos. Nature (2023). https://doi.org/10.1038/s41586-023-05878-z 
• Statler, T. S., Raducan, S. D., Barnouin, O. S., DeCoster, M. E., Chesley, S. R., Barbee, B., et al. After DART: Using the first full-scale test of a kinetic impactor to inform a future planetary defense mission, The Planetary Science Journal, American Astronomical Society, Vol. 3, No. 10, Oct. 2022, doi: https://doi.org/10.3847/PSJ/ac94c1
• Richardson, D. C., Agrusa, H. F., Barbee, B., et al. Predictions for the Dynamical States of the Didymos System Before and After the Planned DART Impact, The Planetary Science Journal, American Astronomical Society, Vol. 3, No. 7, Jul. 2022, doi: https://doi.org/10.3847/PSJ/ac76c9 
• Rivkin, A. S., Chabot, N. L., Stickle, A. M., Thomas, C. A., Richardson, D. C., Barnouin, O., Fahnestock, E. G., Ernst, C. M., Cheng, A. F., Chesley, S., Naidu, S., Statler, T. S., Barbee, B., et al, The Double Asteroid Redirection Test (DART): Planetary Defense Investigations and Requirements, The Planetary Science Journal, American Astronomical Society, Vol. 2, No. 5, Aug. 2021, doi: https://doi.org/10.3847/psj/ac063e 
• Rumpf, C. M., Mathias, D. L., Wheeler, L. F., Dotson, J. L, Barbee, B., Roa, J., Chodas, P., Farnocchia, D., Deflection driven evolution of asteroid impact risk under large uncertainties, Acta Astronautica, Vol. 176, pp. 276-286, 2020, doi: https://doi.org/10.1016/j.actaastro.2020.05.026 
• Dearborn, D. S. P., Bruck Syal, M., Barbee, B. W., et. al., Options and uncertainties in planetary defense: Impulse-dependent response and the physical properties of asteroids, Acta Astronautica, Vol. 166, pp. 290-305, 2020, doi: https://doi.org/10.1016/j.actaastro.2019.10.026 
• Rieger, S. M., Scheeres, D. J., and Barbee, B., Orbital Stability Regions for Hypothetical Natural Satellites of (101955) Bennu, AIAA Journal of Spacecraft and Rockets, Vol. 56, No. 3, pp. 789-800, May 2019, doi: https://doi.org/10.2514/1.A34160 
• Sarli, B., Atchison, J., Ozimek, M., Englander, J., Barbee, B. W., Double Asteroid Redirection Test Mission: Heliocentric Phase Trajectory Analysis, AIAA Journal of Spacecraft and Rockets, Vol. 56, No. 2, March–April 2019, DOI: 10.2514/1.A34108
• Nuth, J. A., Barbee, B., Leung, R., Defending the earth from long-period comets and sneaky asteroids: Short term threat response requires long term preparation, Journal of Space Safety Engineering, Vol. 5, Issues 3-4, pp. 197-202, 2018, doi: https://doi.org/10.1016/j.jsse.2018.07.002 
• Barbee, B. W., Bruck Syal, M., Dearborn, D., et al, Options and uncertainties in planetary defense: Mission planning and vehicle design for flexible response, Acta Astronautica, Vol. 143, pp. 37-61, 2018, doi: https://doi.org/10.1016/j.actaastro.2017.10.021 
• Marcus, M. L., Sloane, J. B., Ortiz, O. B., Barbee, B. W., Planetary Defense Mission Using Guided Collision of Near-Earth Objects, AIAA Journal of Spacecraft and Rockets, Vol. 54, No. 5, pp. 985-992, 2017, doi: https://doi.org/10.2514/1.A33753 
• Starek, J. A., Schmerling, E., Maher, G. D., Barbee, B. W., et. al., Fast, Safe, Propellant-Efficient Spacecraft Motion Planning Under Clohessy-Wiltshire-Hill Dynamics, AIAA Journal of Guidance, Control, and Dynamics (2016), accessed October 18, 2016. doi: http://arc.aiaa.org/doi/abs/10.2514/1.G001913
• Wagner, S., Wie, B., Barbee, B. W., Target selection for a hypervelocity asteroid intercept vehicle flight validation mission, Acta Astronautica, Volume 107, February-March, 2015, pages 247-261, ISSN 0094-5765, http://dx.doi.org/10.1016/j.actaastro.2014.11.037
• Barbee, B. W., Wie, B., Steiner, M., Getzandanner, K., Conceptual design of a flight validation mission for a Hypervelocity Asteroid Intercept Vehicle, Acta Astronautica, Volume 106, January-February, 2015, pages 139-159, ISSN 0094-5765, http://dx.doi.org/10.1016/j.actaastro.2014.10.043.
• Hernandez, S., Barbee, B. W., Bhaskaran, S., Getzandanner, K., Mission opportunities for the flight validation of the kinetic impactor concept for asteroid deflection, Acta Astronautica, Volume 103, October-November 2014, pages 309-321, ISSN 0094-5765, http://dx.doi.org/10.1016/j.actaastro.2014.04.013
• Landis, R. R., Abell, P. A., Adamo, D. R., Barbee, B. W., Johnson, L. N., The first steps towards a de minimus, affordable NEA exploration architecture, Acta Astronautica, Volume 84, March-April 2013, Pages 161-172, ISSN 0094-5765, 10.1016/j.actaastro.2012.10.006
• Barbee, B. W., Carpenter, J. R., Heatwole, S., Markley, F. L., Moreau, M., Naasz, B. J., Van Eepoel, J., A Guidance and Navigation Strategy for Rendezvous and Proximity Operations with a Noncooperative Spacecraft in Geosynchronous Orbit, Journal of the Astronautical Sciences, vol. 58, no. 3, Part 1, pp. 389-408, July-September, 2011, https://doi.org/10.1007/BF03321176
• Barbee, B.W., Nuth, J.A., Asteroid Impact Threats: Advancements in Asteroid Science to Enable Rapid and Effective Deflection Missions, Journal of Cosmology, 2009, Vol. 2, pp. 386-410
• Barbee, B.W., Planetary Defense: Near-Earth Object Deflection Strategies, USAF Air & Space Power Journal (Spanish Edition), Spring 2009, Vol. 21, No.1, April 2009

Conference, Workshop, or Seminar Papers/Presentations/Abstracts/Posters; White Papers; etc.

• Barbee, B. W., Rudolph, A., Storey, C., Prasad, C., Bhingradiya, K., Vishnoi, R., Mahon, R., Philips, S., Akin, D., Bowden, M., Young, J., Mission Concept Development for the TERP RAPTOR (Terrapin Engineered Rideshare Probe for Rapid-response Asteroid Apophis Profiling, Tracking, Observing, and Reconnaissance), AIAA SciTech Forum and Exposition, Orlando, FL, January 6-10, 2025
• Kumamoto, K. M., Barbee, B. W., Pearl, J., Syal, M. B. (2024). Probing disruption heuristics for kinetic deflection of asteroids. AGU 2024, NH43D-2445, https://agu.confex.com/agu/agu24/meetingapp.cgi/Paper/1687747 
• Karl, A., Ailor, W., Barbee, B., Drolshagen, G., Kofler, R., Melamed, N. "Summary and Highlights of the 2023 IAA Planetary Defense Conference," 75th International Astronautical Congress (IAC), Milan, Italy, 14-18 October 2024. IAC-24- E10.1.9
• Daly, R. T., Atchison, J. A., Barbee, B. W., et al. "Key Takeaways from the 5th Planetary Defense Interagency Tabletop Exercise," 75th International Astronautical Congress (IAC), Milan, Italy, 14-18 October 2024. IAC-24-E10.2.1.
• Barbee, B. W., Berdis, J., Chabot, N. L., Fesq, L., Graninger, D., Lyzhoft, J., Raymond, C. NEAR-EARTH OBJECTS WORKSHOPS TO ASSESS RECONNAISSANCE FOR PLANETARY DEFENSE (NEO WARP): CONSIDERATIONS FOR RAPID RESPONSE PLANETARY DEFENSE MISSIONS IN THE CONTEXT OF ASTEROID APOPHIS. Apophis T-5 Years: Knowledge Opportunities for the Science of Planetary Defense. Noordwijk, The Netherlands. April 22-23, 2024. https://www.hou.usra.edu/meetings/apophis2024/pdf/2072.pdf
• Saita, G., Di Tana, V., Burattini, C., Amabili, P., Pereira, M., Ammannito, E., Amato, M., Barbee, B., et al., APOPHIS 2029, ATENA Concept: Mission Design and Satellite Architecture. Apophis T-5 Years: Knowledge Opportunities for the Science of Planetary Defense. Noordwijk, The Netherlands. April 22-23, 2024. https://www.hou.usra.edu/meetings/apophis2024/pdf/2066.pdf
• Barbee, B. W., Benson, B., Burkey, M., Chodas, P., Dotson, J., Kumamoto, K. M., Lyzhoft, J. R., Nuth, J. A., Plesko, C., Sarli, B., Schare, J., Syal, M. B., Vavrina, M. A., and Wheeler, L., Planetary Defense Mission Campaign Design for the 2023 PDC Hypothetical Asteroid Impact Scenario, 8th IAA Planetary Defense Conference, Vienna, Austria, April 3-7, 2023, Link
• Barbee, B. W., Abell, P., Adamo, D., Johnson, L., Landis, R., and Mazanek, D., Prospects for Future Human Space Flight Missions to Near-Earth Asteroids, 8th IAA Planetary Defense Conference, Vienna, Austria, April 3-7, 2023, Link
• Buys, M., Gabriel, J. L., Hannany, S. N., Squirini, R., Wilson, C., Zimmerman, G. K., and Barbee, B. W., THEO & MUFN: Defending Earth Against the 2023 PDC Hypothetical Asteroid Impact, 8th IAA Planetary Defense Conference, Vienna, Austria, April 3-7, 2023, Link
• Barbee, B., Lyzhoft, J. R., et al. (2022). Estimation of the change in velocity experienced by Dimorphos in response to the DART spacecraft impact. AGU 2022, P55F-1622, https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1174684
• Richardson, D. C., Agrusa, H. F., Barbee, B., et al. (2022). First Assessment of the Dynamical State of the Didymos Binary Asteroid System Before and After the DART Impact. AGU 2022, P52A-06, https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1153157
• Cheng, A. F., Rivkin, A., Chabot, N. L., Dotto, E., Della Corte, V., Stickle, A. M., Fahnestock, E., Thomas, C., Barbee, B., et al. (2022). DART Determination of Momentum Transfer from Kinetic Impact: initial results. AGU 2022, P55F-1619, https://agu.confex.com/agu/fm22/meetingapp.cgi/Paper/1119307
• Barbee, B., Abell, P. A., Binzel, R. P., Brozovic, M., Cahill, J., Chodas, P., ... Venditti, F. C. F. (2021). Future Spacecraft Missions for Planetary Defense Preparation. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.dc0c7b69
• Barbee, B., Abell, P. A., Atichson, J., Barnouin, O., Bhaskaran, S., Brophy, J., ... Sotirelis, T. S. (2021). Technology Development for Planetary Defense In Situ Spacecraft Missions to Near-Earth Objects. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.4a9ffc18
• Barbee, B., Abell, P. A., Adamo, D. R., Atichson, J., Barnouin, O., Cahill, J., ... Wheeler, L. (2021). Research and Analysis for Planetary Defense In Situ Spacecraft Missions to Near-Earth Objects. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.50d352f8
• Binzel, R., Barbee, B. W., Barnouin, O. S., Bell, J. F., Birlan, M., Boley, A., ... Yeomans, D. (2021). Apophis 2029: Decadal Opportunity for the Science of Planetary Defense. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.f87e0599
• Stickle, A., Barbee, B., Chodas, P., Daly, T., DeCoster, M., Dotson, J., ... Wheeler, L. (2021). The Need for a Well-defined Modeling Pipeline for Planetary Defense. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.16b6fa5b
• Mainzer, A., Abell, P., Bannister, M. T., Barbee, B., Barnes, J., III, J. F. B., ... Wright, E. L. (2021). The Future of Planetary Defense in the Era of Advanced Surveys. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.ba7af878
• Rivkin, A., Daly, T., Atchison, J., Barbee, B., Abell, P., Stickle, A., ... Scheeres, D. J. (2021). The Case for a Planetary Defense-Optimized NEO Characterization Tour. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.8324ea07
• Adamo, D., Abell, P. A., Anderson, R. C., Barbee, B. W., Jones, T. D., Mazanek, D. D., & Podnar, G. (2021). Near-Earth Object Exploration Leading to Human Visits. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.9f7cdfd3
• Adamo, D., Abell, P. A., Anderson, R. C., Barbee, B. W., Hopkins, J. B., Jones, T. D., ... Podnar, G. (2021). Exploration Leading to Low-Latency Telepresence on Mars from Deimos. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.82d0d8cd
• Abell, P., Raymond, C., Daly, T., Adamo, D. R., Barbee, B. W., Syal, M. B., ... Wheeler, L. (2021). Near-Earth Object Characterization Priorities and Considerations for Planetary Defense. Bulletin of the AAS, 53(4). https://doi.org/10.3847/25c2cfeb.8ad8295a
• Barbee, B., "Summary of the 7th IAA Planetary Defense Conference (PDC)," 25th NASA Small Bodies Assessment Group (SBAG) Meeting, June 7-8, 2021
• Barbee, B., Benson, B., Chodas, P., Dotson, J., Lyzhoft, J., Penas, M. B., Roa, J., Sarli, B., Wheeler, L., "Risk-Informed Spacecraft Mission Design for the 2021 PDC Hypothetical Asteroid Impact Scenario," 7th IAA Planetary Defense Conference (PDC), April 26-30, 2021
• Barbee, B., Benson, B., Chodas, P., Dotson, J., Lyzhoft, J., Penas, M. B., Roa, J., Sarli, B., Wheeler, L., "Space Mission Options for the 2021 PDC Hypothetical Asteroid Impact Scenario," Planetary Defense Conference Exercise 2021, April 26-30, 2021
• Lim, L. F., Barbee, B. W., Bos, B. J. et al., "Reconnaissance of Apophis (RA): A Rendezvous Mission Concept for Exploring the Potentially Hazardous Asteroid Apophis During its 2029 Earth Encounter," 52nd Lunar and Planetary Science Conference, March 15-19, 2021
• Nakano, R., Hirabayashi, M., Agrusa, H. F., Davis, A. B., Meyer, A., Yu, Y., Tsiganis, K., Barbee, B., Lyzhoft, J. R., Scheeres, D. J., Rossi, A., Richardson, D. C., Dimorphos' orbital perturbation induced by shape modification of Didymos after the DART impact, American Geophysical Union, Fall Meeting 2020, abstract #NH037-0004, December 2020, 2020AGUFMNH0370004N
• Osburg, J., Blanc, A., Barbee, B., von der Dunk, F., "Nuclear Devices for Planetary Defense," AIAA ASCEND 2020, https://arc.aiaa.org/doi/abs/10.2514/6.2020-426 
• Barbee, B. W., Sarli, B., Lyzhoft, J., Nuth, J., Purves, L., Lewis, R., "Key Near-Earth Object Characteristics Measurements for Planetary Defense," Apophis T–9 Years: Knowledge Opportunities for the Science of Planetary Defense, November 4-6, 2020
• Barbee, B. W., Lim, L. F., Aslam, S. ,Sarli, B., Lyzhoft, J., Hewagama, T., Nuth, J., Liounis, A., Nakamura, R., Hughes, K., Purves, L., Lewis R., "Reconnaissance of Apophis (RA):  A Mission Concept for Exploring the Potentially Hazardous Asteroid Apophis During Its 2029 Earth Encounter," Apophis T–9 Years: Knowledge Opportunities for the Science of Planetary Defense, November 4-6, 2020
• Schoenwetter, L. Sood, R., Barbee, B., "Optimal Intercept of Evasive Spacecraft," AAS/AIAA Astrodynamics Specialist Conference, Paper AAS 20-540, August 9-12, 2020
• Barbee, B., "Near-Earth Object Characterization Priorities For Planetary Defense," 22nd NASA Small Bodies Assessment Group (SBAG) Meeting, Pasadena, CA, January 14-16, 2020
• Barbee, B., "Summary of the 6th IAA Planetary Defense Conference (PDC)," 21st NASA Small Bodies Assessment Group (SBAG) Meeting, College Park, MD, June 24–25, 2019
• Barbee, B., Lyzhoft, J., Sarli, B., Bambacus, M., Greenaugh, K. C., Lewis, R., Nuth, J. A., Plesko, C., Remington, T., Bruck Syal, M., Truitt, A., Weaver, R. P., "Spacecraft Mission Design For The Mitigation Of The 2019 PDC Hypothetical Asteroid Threat," Presentation IAA-PDC-19-05-11, 6th IAA Planetary Defense Conference (PDC), College Park, MD, April 29-May 3, 2019
• Shams, I. A., Bambacus, M., Greenaugh, K. C., Seery, B., Barbee, B. W., Nuth, J. A., Oman, L., Leung, R., Lewis, R., Plesko, C., Syal, M. B., Li, Y., Yang, J., Yu, M., Yang, C. P., "Planetary Defense Mitigation Gateway: One-Stop Gateway for Pertinent PD-Related Contents," Presentation IAA-PDC-19-08-04, 6th IAA Planetary Defense Conference (PDC), College Park, MD, April 29-May 3, 2019
• Remington, T. P., Bruck Syal, M., Owen, J. M., Barbee, B. W., Lyzhoft, J., "Deflection Of A Small Object Using A Kinetic Impactor," Presentation IAA-PDC-19-04-11, 6th IAA Planetary Defense Conference (PDC), College Park, MD, April 29-May 3, 2019
• Barbee, B., Chodas, P., Lyzhoft, J., Petropoulos, A, Roa, J., Sarli, B., "2019 PDC Mitigation Mission Options - Conference Day 4," Planetary Defense Conference Exercise 2019, College Park, MD, April 29-May 3, 2019
• Barbee, B., Chodas, P., Lyzhoft, J., Petropoulos, A, Roa, J., Sarli, B., "2019 PDC Mitigation Mission Options - Conference Day 3," Planetary Defense Conference Exercise 2019, College Park, MD, April 29-May 3, 2019
• Barbee, B., Chodas, P., Lyzhoft, J., Petropoulos, A, Roa, J., Sarli, B., "2019 PDC Mitigation Mission Options - Conference Day 2," pp. 27-38, Planetary Defense Conference Exercise 2019, College Park, MD, April 29-May 3, 2019
• Shams, I., Barbee, B., Bambacus, M., Yang, C. P., Yu, M., Jiang, Y., Planetary Defense Mitigation Gateway, American Geophysical Union, Fall Meeting 2018, P53D-2994, December 2018, 2018AGUFM.P53D2994S
• Sarli, B. V., Knittel, J. M., Englander, J. A., Barbee, B. W., "Mission Design and Optimal Asteroid Deflection for Planetary Defense," 68th International Astronautical Congress, International Aeronautical Federation. Paper IAC-2017-C1, Vol. 7, September 2017
• Barbee, B., "Summary of the 5th IAA Planetary Defense Conference (PDC),"17th NASA Small Bodies Assessment Group (SBAG) Meeting, Greenbelt, MD, June 12–14, 2017
• Barbee, B. W., Sarli, B. V., Lyzhoft, J., Chodas, P. W., Englander, J. A., "Spacecraft Mission Design for the Mitigation of the 2017PDC Hypothetical Asteroid Threat," Presentation IAA-PDC-17-05-10, 5th IAA Planetary Defense Conference (PDC), Tokyo, Japan, May 15-19, 2017
• Barbee, B. W., Greenaugh, K. C., Seery, B. D., Bambacus, M., Leung, R. Y., Finewood, L., Dearborn, D. S. P., Miller, P. L., Weaver, R. P., Plesko, C., Bruck-Syal, M., "Studies of Short Time Response Options for Potentially Hazardous Objects: Current and Forthcoming Results," Poster IAA-PDC-17-05-P01, 5th IAA Planetary Defense Conference (PDC), Tokyo, Japan, May 15-19, 2017
• Nuth, J. A., Barbee, B., Leung, R., "Short Term Threat Response Requires Long Term Preparation," Paper IAA-PDC-17-08-03, 5th IAA Planetary Defense Conference (PDC), Tokyo, Japan, May 15-19, 2017
• Barbee, B., "Preliminary 2017 PDC Mission Design Considerations," Planetary Defense Conference Exercise 2017, Tokyo, Japan, May 15-19, 2017
• Leung, R. Y., Barbee, B. W., Seery, B. D., Bambacus, M., Finewood, L., Greenaugh, K. C., Lewis, A., Dearborn, D. S. P., Miller, P. L., Weaver, R. P., Plesko, C., "Multi-organization - Multi-discipline effort developing a mitigation concept for planetary defense," 2017 IEEE Aerospace Conference, 2017, pp. 1-20, doi: 10.1109/AERO.2017.7943681
• Yang, C. P., Manzhu, Y., Xu, M., Jiang, Y., Qin, H., Li, Y., Bambacus, M., Leung, R. Y., Barbee, B. W., Nuth, J. A., Seery, B., Bertini, N., Dearborn, D. S. P., Piccione, M., Culbertson, R., Plesko, C., "An architecture for mitigating near earth object's impact to the earth," 2017 IEEE Aerospace Conference, 2017, pp. 1-13, doi: 10.1109/AERO.2017.7943594
• Zebenay, M., Lyzhoft, J., Barbee, B. W., "Hybrid Guidance Control for a Hypervelocity Small Size Asteroid Interceptor Vehicle," Paper AAS 17-270, 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio, Texas, February 5-9, 2017
• Sarli, B. V., Ozimek, M. T., Atchison, J. A., Englander, J. A., Barbee, B. W., "NASA Double Asteroid Redirection Test (DART) Trajectory Validation and Robustness," Paper AAS 17-206, 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio, Texas, February 5-9, 2017
• Nuth, J. A. III, Barbee, B., Leung, R. Y., Planetary Defense: Are we currently looking for our keys under the lamp post?, American Geophysical Union, Fall Meeting 2016, abstract #NH12A-10, December 2016, 2016AGUFMNH12A..10N
• Barbee, B., Syal, M., Gisler, G., "NEA Mitigation Studies for Short Warning Time Scenarios," 15th Meeting of the NASA Small Bodies Assessment Group (SBAG) Meeting, Laurel, MD, June 28-30, 2016
• Starek, J. A., Schmerling, E., Maher, G. D., Barbee, B. W., et. al., "Real-Time, Propellant-Optimized Spacecraft Motion Planning under Clohessy-Wiltshire-Hill Dynamics," Proceedings of the IEEE Aerospace Conference, Big Sky Montana, Big Sky, Montana, March 5-12, 2016
• Rieger, S., Scheeres, D., Barbee, B., "Orbital Stability Regions for Hypothetical Natural Satellites of 101955 Bennu (1999 RQ36)," Paper AAS 16-439, 26th AAS/AIAA Space Flight Mechanics Meeting, Napa, CA, February 14-18, 2016
• Barbee, B. W., Chodas, P., “Near-Earth Asteroids 2006 RH120 and 2009 BD: Proxies For Maximally Accessible Objects?” AAS/AIAA Astrodynamics Specialist Conference, Paper Number AAS 15-526, Vail, CO, August 9-13, 2015
• De Smet, S., Parker, J., Herman, J. F. C., Aziz, J., Barbee, B., Englander, J., “Identifying Accessible Near-Earth Objects For Crewed Missions With Solar Electric Propulsion,” AAS/AIAA Astrodynamics Specialist Conference, Paper Number AAS 15-598, Vail, CO, August 9-13, 2015
• Wie, B., Barbee, B. W., "An Optimal Mitigation Strategy Against the Asteroid Impact Threat with Short Warning Time," 7th International Conference on Recent Advances in Space Technologies (RAST 2015), June 16-19, 2015, Istanbul, Turkey
• Barbee, B. W., Abell, P. A., Adamo, D. R., Mazanek, D. D., Johnson, L. N., Yeomans, D. K., Chodas, P. W., Chamberlin, A. B., Benner, L. A. M., Taylor, P., Friedensen, V. P., "The Mission Accessibility of Near-Earth Asteroids," 2015 IAA Planetary Defense Conference, Frascati, Roma, Italy, April 13-17, 2015
• Weaver, R. P., Barbee, B. W., Wie, B., Zimmerman, B., "Los Alamos RAGE Simulations of the HAIV/NIAC NASA Mission," 2015 IAA Planetary Defense Conference, Frascati, Roma, Italy, April 13-17, 2015
• Miller, P., Barbee, B., Morrison, D., "Asteroid Characterization Priorities For Planetary Defense," 2015 IAA Planetary Defense Conference, Frascati, Roma, Italy, April 13-17, 2015
• Seery, B., Barbee, B. W., Boslough, M., Dearborn, D., Farrell, W., Kinney, A., Miller, P., Noll, K., Nuth, J., Plesko, C., Weaver, R., "Investigations of Short Warning Time Response Options for Hazardous Near-Earth Objects," 2015 IAA Planetary Defense Conference, Frascati, Roma, Italy, April 13-17, 2015
• Marcus, M., Ortiz, O., Sloane, J., Barbee, B. W., "BILLIARDS: A Demonstration Mission for Hundred-Meter Class Near Earth Asteroid Disruption," 2015 IAA Planetary Defense Conference, Frascati, Roma, Italy, April 13-17, 2015
• Hupp, R., DeWald, S., Wie, B., Barbee, B. W., "Suborbital Asteroid Intercept and Fragmentation For Very Short Warning Time Scenarios," 2015 IAA Planetary Defense Conference, Frascati, Roma, Italy, April 13-17, 2015
• Barbee, B. W., "Small Planetary Bodies: Current Scientific Developments," USRA/SPI Symposium on Asteroids, NEOs, and Small Bodies in the Solar System, March 26, 2015, Washington, DC
• Seery, B., Barbee, B., Nuth, J., Oman, L., Boslough, M., Miller, P., Plesko, C., Weaver, R., "Investigations of Short Warning Time Response Options for Hazardous Near-Earth Objects," IEEE Aerospace Conference, Big Sky, Montana, March 7-14, 2015
• Starek, J. A., Barbee, B., Pavone, M., "A Sampling-Based Approach To Spacecraft Autonomous Maneuvering With Safety Specifications," Paper Number AAS 15-116, 2015 AAS G&NC Conference, Breckenridge, CO, January 30 - February 4, 2015
• Barbee, B. W., "Accessible Near-Earth Objects (NEOs)," 12th Meeting of the NASA Small Bodies Assessment Group (SBAG), Phoenix, AZ, January 6-7, 2015
• Hupp, R., DeWald, S., Wie, B., Barbee, B. W., "Mission Design and Analysis for Suborbital Intercept and Fragmentation of an Asteroid with Very Short Warning Time," Paper AIAA-2014-4460 in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference, San Diego, California, August 4-7, 2014
• Adamo, D. R., Lester, D. F., Thronson, H. A., Barbee, B. W., "A Class of Selenocentric Retrograde Orbits With Innovative Applications To Human Lunar Operations," Paper AIAA-2014-4116 in Proceedings of the AIAA/AAS Astrodynamics Specialist Conference, San Diego, California, August 4-7, 2014
• Barbee, B. W., Chodas, P. W., Chamberlin, A. B., "The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS)," Presented to the 1st Annual NASA SSERVI Exploration Science Forum, NASA Ames Research Center, July 23, 2014, Moffett Field, CA
• Barbee, B. W., "Near-Earth Asteroids: Destinations for Human Exploration," Presented to the AIAA Mid-Atlantic Section Awards Dinner, June 6, 2014, Baltimore, MD
• Barbee, B. W., "The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS)," 10th Meeting of the NASA Small Bodies Assessment Group, January 8-9, 2014, Washington, DC
• Barbee, B. W., "Target NEO 2 Workshop: Summary and Findings," 10th Meeting of the NASA Small Bodies Assessment Group, January 8-9, 2014, Washington, DC
• Bailey, L., Folta, D., Barbee, B. W., Vaughn, F., Kirchman, F., Englander, J., Campbell, B., Thronson, H., Lin, T. Y., "A Lean, Fast Mars Round-trip Mission Architecture: Using Current Technologies for a Human Mission in the 2030s," Proceedings of the AIAA SPACE 2013 Conference & Exposition, San Diego, California, September 10-12, 2013
• Barbee, B. W., Wie, B., Steiner, M., Getzandanner, K., "Conceptual Design of a Hypervelocity Asteroid Intercept Vehicle (HAIV) Flight Validation Mission," Paper AIAA-2013-4544 in Proceedings of the AIAA Guidance, Navigation, and Control Conference, Boston, Massachusetts, August 19-22, 2013
• Barbee, B. W., Landau, D., "Trajectory Design for the Exploration of Phobos and Deimos," AAS/AIAA Paper AAS 13-936, AAS/AIAA Astrodynamics Specialist Conference, Hilton Head, South Carolina, August 11-15, 2013
• Folta, D., Barbee, B. W., Englander, J., Vaughn, F., Lin, T. Y., "Optimal Round-Trip Trajectories for Short Duration Mars Missions," AAS/AIAA Paper AAS 13-808, AAS/AIAA Astrodynamics Specialist Conference, Hilton Head, South Carolina, August 11-15, 2013 
• Barbee, B. W., "Near-Earth Asteroids: The Next Destination for Human Explorers," input to The National Academies Committee on Human Spaceflight call for papers. Download PDF.
• Barbee, B. W., "The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS)," International Primitive body Exploration Working Group (IPEWG), May 29-31, 2013, Nice, France
• Barbee, B. W., Abell, P. A., Adamo, D. R., Alberding, C. M., Mazanek, D. D., Johnson, L. N., Yeomans, D. K., Chodas, P. W., Chamberlin, A. B., Friedensen, V. P., "The Near-Earth Object Human Space Flight Accessible Targets Study: An Ongoing Effort to Identify Near-Earth Asteroid Destinations for Human Explorers," 2013 IAA Planetary Defense Conference, Flagstaff, AZ, April 15-19, 2013
• Wagner, S., Wie, B., Barbee, B. W., "Target Selection for a Hypervelocity Asteroid Intercept Vehicle Flight Validation Mission," 2013 IAA Planetary Defense Conference, Flagstaff, AZ, April 15-19, 2013
• Beckman, M., Barbee, B. W., Williams, B., Williams, K., Sutter, B., Berry, K., "Trajectory and Mission Design for the Origins Spectral Interpretation Resource Identification Security Regolith Explorer (OSIRIS-REx) Asteroid Sample Return Mission," 2013 IAA Planetary Defense Conference, Flagstaff, AZ, April 15-19, 2013
• Barbee, B. W., Wie, B., Steiner, M., Getzandanner, K., "Conceptual Design of a Flight Validation Mission for a Hypervelocity Asteroid Intercept Vehicle," 2013 IAA Planetary Defense Conference, Flagstaff, AZ, April 15-19, 2013
• Hernandez, S., Barbee, B. W., Bhaskaran, S., Getzandanner, K., "Mission Opportunities for the Flight Validation of the Kinetic Impactor Concept for Asteroid Deflection," 2013 IAA Planetary Defense Conference, Flagstaff, AZ, April 15-19, 2013
• Berry, K., Sutter, B., May, A., Williams, K., Barbee, B. W., Beckman, M., Williams, B., "OSIRIS-REx Touch-And-Go (TAG) Mission Design and Analysis," AAS/AIAA Paper AAS 13-095, 36th Annual AAS Guidance and Control Conference, Breckenridge, CO, February 1-6, 2013
• Barbee, B. W., Alfano, S., Gold, K., Gaylor, D., Pinon, E., "Design of Spacecraft Missions to Remove Multiple Orbital Debris Objects," Advances in the Astronautical Sciences, Vol. 144, Univelt, Inc., San Diego, CA, 2012, pp. 93-110, also AAS/AIAA Paper AAS 12-017, 35th Annual AAS Guidance and Control Conference, Breckenridge, CO, February 3-8, 2012
• Hernandez, S., Barbee, B. W., "Design of Spacecraft Missions to Test Kinetic Impact for Asteroid Deflection," Advances in the Astronautical Sciences, Vol. 143, Univelt, Inc., San Diego, CA, 2012, pp. 399-418, also AAS/AIAA Paper AAS 12-129, AAS/AIAA Space Flight Mechanics Meeting, Charleston, South Carolina, January 29 - February 2, 2012
• Abell, P. A., Barbee, B. W., Mink, R. G., Adamo, D. R., Alberding, C.M., Mazanek, D. D., Johnson, L. N., Yeomans, D. K., Chodas, P. W., Chamberlin, A. B., Benner, L. A. M., Drake, B. G., Friedensen, V. P., "The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS) List of Near-Earth Asteroids: Identifying Potential Targets for Future Exploration," 44th annual meeting of the Division for Planetary Sciences of the American Astronomical Society, Reno, NV, October 14-19, 2012
• Landau, D. F., Barbee, B. W., Woolley, R. C., Gershman, "Orbital Transfer Techniques for Round-Trip Mars Missions," Concepts and Approaches for Mars Exploration, Lunar and Planetary Institute, Houston, TX, June 12-14, 2012
• Mazanek, D. D., Abell, P. A., Antol, J., Barbee, B. W., Beaty, D. W., Bass, D. S., Castillo-Rogez, J. C., Coan, D. A., Colaprete, A., Daugherty, K. J., Drake, B. G., Earle, K. D., Graham, L. D., Hembree, R. M., Hoffman, S. J., Jefferies, S. A., Lewis, R., Lupisella, M. L., Reeves, D. M., "Overview of a Preliminary Destination Mission Concept for a Human Orbital Mission to the Martian Moons," Concepts and Approaches for Mars Exploration, Lunar and Planetary Institute, Houston, TX, June 12-14, 2012
• Landis, R. R., Barbee, B. W., Mink, R., Garvin, J., Sellers, P., Abell, P. A., Mauzy, S., Graham, L., Adamo, D., Mazanek, D., Reed, C., Cheng, A., Rivkin, A., Gold, R., Hibbard, K., Dissly, R., Jones, T., Johnson, L., Gerstenmaier, W., "The First Steps Towards a De Minimus, Affordable NEA Exploration Architecture," IAF/AIAA Global Space Exploration Conference 2012, L'Enfant Plaza Hotel, Washington, DC, May 22-24, 2012
• Yeomans, D. K., Barbee, B. W., Melamed, N., Anderson, J. P., Chamberlin, A. B., Chesley, S. R., Chodas, P. W., Giorgini, J. D., Johnson, L. N., "New On-Line Tools for the Human Exploration and Threat Mitigation of Near-Earth Asteroids," Asteroids, Comets, Meteors (ACM) 2012, Niigata, Japan, May 16-20, 2012
• Abell, P. A., Mazanek, D. D., Barbee, B. W., Mink, R. G., Landis, R. R., Adamo, D. R., Johnson, L. N., Yeomans, D. K., Reeves, D. M., Larman8, K. T., Drake, B. G., and Friedensen, V. P., "Human Missions to Near-Earth Asteroids: An Update on NASA's Current Status and Proposed Activities for Small Body Exploration," Asteroids, Comets, Meteors (ACM) 2012, Niigata, Japan, May 16-20, 2012
• Landis, R. R., Abell, P. A., Mainzer, A., Barbee, B. W., Adamo, D. R., Johnson, L., and Graham, L. D., "Finding Near-Earth Asteroid (NEA) Destinations for Human Exploration: Implications for Astrobiology," NASA Astrobiology Science Conference 2012, Atlanta, Georgia, April 16-20, 2012
• Abell, P. A., Barbee, B. W., Mink, R. G., Adamo, D. R., Alberding, C. M., Mazanek, D. D., Johnson, L. N., Yeomans, D. K.,Chodas, P. W., Chamberlin, A. B., Benner, L. A. M., Drake, B. G., and Friedensen, V. P., "The Near-Earth Object Human Space Flight Accessible Targets Study (NHATS) List of Near-Earth Asteroids: Identifying Potential Targets for Future Exploration," 43rd Lunar and Planetary Science Conference, The Woodlands, Texas, March 19-23, 2012
• Landis, R., Barbee, B., Mink, R., Garvin, J., Sellers, P., Abell, P., Mauzy, S., Graham, L., Adamo, D., Mazanek, D., Reed, C., Cheng, A., Rivkin, A., Gold, R., Hibbard, K., Dissly, R., Jones, T., Johnson, L., Gerstenmaier, W., "A Simplified, Minimal Risk Architectural Strategy for the Exploration of Near-Earth Objects," 62nd International Astronautical Congress, Cape Town, South Africa, October 3-7, 2011
• Adamo, D. R., Barbee, B. W., "Why Atens Enjoy Enhanced Accessibility for Human Space Flight," Advances in the Astronautical Sciences, Vol. 142, Univelt, Inc., San Diego, CA, 2011, pp. 709-728, also AAS/AIAA Paper AAS 11-449, AAS/AIAA Astrodynamics Specialist Conference, Girdwood, Alaska, July 31 - August 4, 2011
• Barbee, B. W., Mink, R. G., Adamo, D. R., Alberding, C. M., "Methodology and Results of the Near-Earth Object (NEO) Human Space Flight (HSF) Accessible Targets Study (NHATS)," Advances in the Astronautical Sciences, Vol. 142, Univelt, Inc., San Diego, CA, 2011, pp. 613-632, also AAS/AIAA Paper AAS 11-444, AAS/AIAA Astrodynamics Specialist Conference, Girdwood, Alaska, July 31 - August 4, 2011
• Hernandez, S., Barbee, B. W., "Design of Round-Trip Trajectories to Near-Earth Asteroids Utilizing a Lunar Flyby," Advances in the Astronautical Sciences, Vol. 140, Univelt, Inc., San Diego, CA, 2011, pp. 1177-1191, also AAS/AIAA Paper AAS 11-181, 21st AAS/AIAA Space Flight Mechanics Meeting, New Orleans, Louisiana, February 13-17, 2011
• Abell, P. A., Mink, R. G., Garvin, J. B., Barbee, B. W., Mazanek, D., Komar, D. R., Adamo, D., Cheng, A., Rivkin, A. S., Hibbard, K., Miller, K. L., Dissly, R., Mainzer, A., Yeomans, D. K., Johnson, L. N.,"A Space-Based Near-Earth Object Survey Telescope in Support of Human Exploration, Solar System Science, and Planetary Defense," 2011 IAA Planetary Defense Conference, Bucharest, Romania, May 9-12, 2011
• Cheng, A. F., Rivkin, A. S., Hibbard, K., Mink, R., Barbee, B., Garvin, J., Abell, P., Mazanek, D., Landis, R., "Near-Earth Asteroid Survey Precursor to Human Exploration," 42nd Lunar and Planetary Science Conference, The Woodlands, Texas, March 7-11, 2011
• Barbee, B. W., Alfano, S., Gold, K., Gaylor, D., Pinon, E., "Design of Spacecraft Missions to Remove Multiple Orbital Debris Objects," Proceedings of the 2011 IEEE Aerospace Conference, Big Sky, Montana, March 5-12, 2011
• Barbee, B. W., "Micropropulsion Trajectory Design and Enabled Mission Destinations," Desktop Delta-V Workshop, February 17, 2011, Brown University, Providence, RI
• Naasz, B.J., Strube, M., Van Eepoel, J., Barbee, B. W., Getzandanner, K.M., "Satellite Servicing's Autonomous Rendezvous and Docking Testbed on the International Space Station," AAS/AIAA Paper AAS 11-072, 34th Annual AAS Guidance and Control Conference, Breckenridge, CO, February 5-9, 2011
• Barbee, B. W., "The L1 Orbit Trajectory Used for Servicing (LOTUS): Enabling Human/Robotic Servicing Missions in the Earth-Moon System," Future In-Space Operations (FISO) Telecons, June 16, 2010, Greenbelt, MD
• Barbee, B. W., "The Accessibility of Near-Earth Asteroids for Human Missions," NASA/GSFC Flight Dynamics Seminar, June 10, 2010, Greenbelt, MD
• Barbee, B. W., Gaylor, D.E., "Automated Real-Time Targeting and Guidance (ARTGUID) for Lunar Descent and Precision Landing," Advances in the Astronautical Sciences, Vol. 137, Univelt, Inc., San Diego, CA, 2010, pp. 149-164, also AAS/AIAA Paper AAS 10-035, 33rd Annual AAS Guidance and Control Conference, Breckenridge, CO, February, 2010
• Barbee, B. W., Esposito, T., Mink, R.G., Adamo, D.R., Pinon, E., Hur-Diaz, S., "A Comprehensive Ongoing Survey of the Near-Earth Asteroid Population for Human Mission Accessibility," AIAA/AAS Astrodynamics Specialist Conference, Toronto, Ontario, Canada, August 2-5, 2010
• Barbee, B. W., Alfano, S., Gold, K., Gaylor, D., Pinon, E., "Mission Design for Multi-Object Orbital Debris Removal Tours," George H. Born Symposium, Boulder, CO, May, 2010
• Barbee, B. W., Carpenter, J.R., Heatwole, S., Markley, F.L., Moreau, M., Naasz, B.J., Van Eepoel, J., "Guidance and Navigation for Rendezvous and Proximity Operations with a Non-Cooperative Spacecraft at Geosynchronous Orbit," George H. Born Symposium, Boulder, CO, May, 2010
• Barbee, B. W., Davis, G.W., Hur-Diaz, S., "Spacecraft Trajectory Design for Tours of Multiple Small Bodies," Advances in the Astronautical Sciences, Vol. 135, Univelt, Inc., San Diego, CA, 2009, pp. 2169-2188, also AAS/AIAA Paper AAS 09-443, Astrodynamics Specialists Conference, Aug. 2009
• Barbee, B. W., "A Survey of Capabilities and Program Objectives for Using Nuclear Devices to Mitigate the Threat Posed by Hazardous Near-Earth Objects," 2008 Asteroid Deflection Research Symposium, October 24, 2008, Crystal City, VA
• Mitchell, J. W., Baldwin, P. J., Barbee, B. W., Kurichh, R., and Luquette, R. J., "Characterization of a Radio Frequency Space Environment Path Emulator for Evaluating Spacecraft Ranging Hardware," AIAA Guidance, Navigation, & Control Conference, August, 2008
• Barbee, B. W., Blair, B., "Get Rich or Go Extinct: The Asteroid Business Case," NewSpace 2008: Creating the Future or Living in the Past, July 19, 2008, Crystal City, VA
• Mitchell, J. W., Barbee, B. W., Baldwin, P. J., Luquette, R., "Expanding Hardware-in-the-Loop Formation Navigation and Control with Radio Frequency Crosslink Ranging," Proceedings of the 20th International Symposium on Space Flight Dynamics, September 24-28, 2007 (Historic Inns of Annapolis, Governor Calvert House, Annapolis, Maryland, USA)
• Barbee, B. W., "Deflection of Hazardous Near-Earth Objects using Nuclear Explosive Technology," Aerospace Technology Working Group Meeting, May 22, 2007, Dallas, TX
• Barbee, B. W., "A Discovery Class Scientific Characterization Mission to Asteroid Apophis," NASA/GSFC Flight Dynamics Seminar, May 9, 2007, Greenbelt, MD
• Barbee, B. W., "Algorithms for Safe Spacecraft Proximity and Rendezvous Operations," Internal seminar at the Johns Hopkins Applied Physics Laboratories, March 19, 2007, Laurel, MD
• Barbee, B. W., Fowler, W. T., "Spacecraft Mission Design for the Optimal Impulsive Deflection of Hazardous Near-Earth Objects (NEOs) using Nuclear Explosive Technology," Planetary Defense Conference, Washington DC, March 5-8, 2007
• Barbee, B. W., Gertsch, L., Fowler, W. T., "Spacecraft Mission Design for the Destruction of Hazardous Near-Earth Objects (NEOs) via Distributed-Energy Explosives," Planetary Defense Conference, Washington DC, March 5-8, 2007
• Gaylor, D. E., Barbee, B. W., "Algorithms for Safe Spacecraft Proximity Operations," AAS-2007-107, AAS/AIAA Spaceflight Mechanics Meeting, Sedona, Arizona, January 28, 2007
• Barbee, B. W., "Safe Autonomous Proximity Operations Algorithms," Internal seminar at the Naval Research Laboratories, November 7, 2006, Washington, D.C.
• Barbee, B. W., "Systems Engineering Approach to the Mitigation of Hazardous Near-Earth Objects (NEOs)," NASA/GSFC Systems Engineering Seminar Series, July 11, 2006, Greenbelt, MD
• Barbee, B. W., Fowler, W. T., Davis, G. W., Gaylor, D. E., "Optimal Deflection of Hazardous Near-Earth Objects and Mitigation Mission Design Using Current Technology," 2006 NASA Near-Earth Object Detection and Threat Mitigation Workshop, Vail, CO, June 26-29, 2006