Assessing NEO hazard mitigation in terms of astrodynamics and propulsion systems requirements

Annals of the New York Academy of Sciences
John L Remo

Abstract

Uncertainties associated with assessing valid near-Earth object (NEO) threats and carrying out interception missions place unique and stringent burdens on designing mission architecture, astrodynamics, and spacecraft propulsion systems. A prime uncertainty is associated with the meaning of NEO orbit predictability regarding Earth impact. Analyses of past NEO orbits and impact probabilities indicate uncertainties in determining if a projected NEO threat will actually materialize within a given time frame. Other uncertainties regard estimated mass, composition, and structural integrity of the NEO body. At issue is if one can reliably estimate a NEO threat and its magnitude. Parameters that determine NEO deflection requirements within various time frames, including the terminal orbital pass before impact, and necessary energy payloads, are quantitatively discussed. Propulsion system requirements for extending space capabilities to rapidly interact with NEOs at ranges of up to about 1 AU (astronomical unit) from Earth are outlined. Such missions, without gravitational boosts, are deemed critical for a practical and effective response to mitigation. If an impact threat is confirmed on an immediate orbital pass, the option for intera...Continue Reading

References

Jun 29, 2004·Annals of the New York Academy of Sciences·David Folta
Jun 6, 1980·Science·L W AlvarezH V Michel

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Citations

Jun 29, 2004·Annals of the New York Academy of Sciences·John L Remo

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