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<\/a><\/figure>For the benefit of all, NASA released a summary<\/a> Thursday of the fifth biennial Planetary Defense Interagency Tabletop Exercise. NASA\u2019s Planetary Defense Coordination Office, in partnership with FEMA (Federal Emergency Management Agency) and with the assistance of the U.S. Department of State Office of Space Affairs, convened the tabletop exercise to inform and assess our ability as a nation to respond effectively to the threat of a potentially hazardous asteroid or comet.<\/p>\n Although there are no known significant asteroid impact threats for the foreseeable future, hypothetical exercises provide valuable insights by exploring the risks, response options, and opportunities for collaboration posed by varying scenarios, from minor regional damage with little warning to potential global catastrophes predicted years or even decades in the future.<\/p>\n \u201cThe uncertainties in these initial conditions for the exercise allowed participants to consider a particularly challenging set of circumstances,\u201d said Lindley Johnson, planetary defense officer emeritus NASA Headquarters in Washington. \u201cA large asteroid impact is potentially the only natural disaster humanity has the technology to predict years in advance and take action to prevent.\u201d<\/p>\n During the exercise, participants considered potential national and global responses to a hypothetical scenario in which a never-before-detected asteroid was identified that had, according to initial calculations, a 72% chance of hitting Earth in approximately 14 years. The preliminary observations described in the exercise, however, were not sufficient to precisely determine the asteroid\u2019s size, composition, and long-term trajectory. To complicate this year\u2019s hypothetical scenario, essential follow-up observations would have to be delayed for at least seven months \u2013 a critical loss of time \u2013 as the asteroid passed behind the Sun as seen from Earth\u2019s vantage point in space.<\/p>\n Conducting exercises enable government stakeholders to identify and resolve potential issues as part of preparation for any real-world situation. It was held in April at the Johns Hopkins Applied Physics Laboratory (APL) in Laurel, Maryland, and brought together nearly 100 representatives from across U.S. government agencies and, for the first time, international collaborators on planetary defense.<\/p>\n \u201cOur mission is helping people before, during, and after disasters,\u201d said Leviticus \u201cL.A.\u201d Lewis, FEMA detailee to NASA\u2019s Planetary Defense Coordination Office. \u201cWe work across the country every day before disasters happen to help people and communities understand and prepare for possible risks. In the event of a potential asteroid impact, FEMA would be a leading player in interagency coordination.\u201d\u00a0<\/p>\n This exercise was the first to use data from NASA\u2019s DART (Double Asteroid Redirection Test) mission, the first in-space demonstration of a technology for defending Earth against potential asteroid impacts. The DART spacecraft, which impacted the asteroid moonlet Dimorphos on Sept. 26, 2022, confirmed a kinetic impactor could change the trajectory of an asteroid. Applying this or any type of technology to an actual impact threat would require many years of advance planning.<\/p>\n To help ensure humanity will have the time needed to evaluate and respond to a potentially hazardous asteroid or comet, NASA continues the development of its NEO Surveyor (Near-Earth Object Surveyor), an infrared space telescope designed specifically to expedite our ability to discover and characterize most of the potentially hazardous near-Earth objects many years before they could become an impact threat. The agency\u2019s NEO Surveyor\u2019s proposed launch date is set for June 2028.<\/p>\n NASA will publish a complete after-action report for the tabletop exercise later, which will include strengths and gaps identified from analysis of the response, other discussions during the exercise, and recommendations for improvement.<\/p>\n \u201cThese outcomes will help to shape future exercises and studies to ensure NASA and other government agencies continue improving planetary defense preparedness,\u201d said Johnson.<\/p>\n NASA established the Planetary Defense Coordination Office in 2016 to manage the agency\u2019s ongoing planetary-defense efforts. Johns Hopkins APL managed the DART mission for NASA as a project of the agency\u2019s Planetary Missions Program Office.<\/p>\n To learn more about planetary defense at NASA, visit:<\/p>\n https:\/\/science.nasa.gov\/planetary-defense\/<\/a><\/p>\n -end-<\/p>\n Charles Blue \/ Karen Fox
Headquarters, Washington\u00a0
202-802-5345 \/ 202-358-1600
charles.e.blue@nasa.gov<\/a> \/ karen.fox@nasa.gov<\/a><\/p>\nShare<\/h2>\n<\/p><\/div>\n