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NEOShield: the physical properties of the most frequent impactors

Drube, Line and Harris, A.W. and Barucci, M.A. and Fulchignoni, M. and Perna, D. (2013) NEOShield: the physical properties of the most frequent impactors. 2013 IAA Planetary Defense Conference “Gathering for Impact!”, 15-19 Apr 2013, Flagstaff, Arizona, USA.

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Official URL: http://www.iaaconferences.org/pdc2013/?q=ipc

Abstract

NEOShield is a consortium of 13 research institutes, universities and industrial partners from 6 countries. The aim of the project is to explore mitigation options in the event that a NEO is found to be on a potential collision course with Earth, and to pave the way for demonstration missions to test proposed mitigation techniques. Finding an accessible and appropriate target NEO for a demonstration mission is an important aspect of mission design. We are carrying out a statistical investigation of the properties of the known NEO population, using the latest published data, with the aim of estimating the most likely mitigation-relevant physical properties of the first NEO to trigger a space-borne mitigation action. Our investigation focuses on the physical properties of the most frequent serious impactors. We define a serious impactor to be one with the potential to lead to major loss of life and damage to infrastructure. At the low end of the size range our definition includes atmospheric events such as the 1908 Tunguska explosion, caused by a body with a diameter, D, of around 50 m. We consider the upper limit of our size-range of interest to be around D = 200 m, because for objects above this size the impact frequency drops below 1 per 10 000 years. However as there are large uncertainties related to the calculation of diameter, we include NEOs with H > 20 mag (D < 300 m). Another reason for considering objects larger than 200 m is the fact that present guidance, navigation, and control (GNC) technology may dictate a minimum size larger than 200 m for the target of a feasible demonstration mission to ensure a high chance of success (although research to improve GNC performance is part of the NEOShield project). Very little is known about NEOs with D < 300 m, as only 2% of the more than 5400 discovered NEOs in this size range have had any physical properties measured besides H magnitudes. Our investigation includes recently published data from the NEOWISE and Warm Spitzer ExploreNEOs surveys, without which this fraction would be much smaller.

Item URL in elib:https://elib.dlr.de/83266/
Document Type:Conference or Workshop Item (Poster)
Title:NEOShield: the physical properties of the most frequent impactors
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Drube, LineLine.Drube (at) dlr.dehttps://orcid.org/0000-0003-2486-8894
Harris, A.W.alan.harris (at) dlr.deUNSPECIFIED
Barucci, M.A.LESIA-Observatoire de Paris, FranceUNSPECIFIED
Fulchignoni, M.LESIA-Observatoire de Paris, FranceUNSPECIFIED
Perna, D.LESIA-Observatoire de Paris, FranceUNSPECIFIED
Date:April 2013
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:NEOShield, near-Earth objects, impact hazard, mitigation
Event Title:2013 IAA Planetary Defense Conference “Gathering for Impact!”
Event Location:Flagstaff, Arizona, USA
Event Type:international Conference
Event Dates:15-19 Apr 2013
Organizer:International Astronautical Association
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Asteroiden und Kometen (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Deposited By: Harris, Prof. Alan
Deposited On:20 Aug 2013 14:46
Last Modified:31 Jul 2019 19:41

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