Transcript WS3_Intro - Association of Space Explorers

Welcome… to ASE WS#3
&
Earth University
ASE-NEO Workshops on NEO Deflection
23 April 2008
New Developments in the
NEO Environment
Rusty Schweickart
Chairman, ASE-NEO Committee
Current Statistics and Risk Table
Comments
Congressional Hearings and Pending
Legislation
Congressional Hearing
8 November 2007
Primary Issues
Addressed
NASA’s NEO Report
Arecibo Radar
Future Actions
Full hearing record
available on web:
http://www.science.house.gov/publicati
ons/hearings_markups_details.aspx?N
ewsID=2033
Congressman Dana Rohrabacher’s new bill requiring
NASA take next steps toward developing deflection
capability. Also calls on NASA to work with the
National Academies on evaluating institutional
responsibility in US Government for NEOs
ASE-NEO Workshops on NEO Deflection
23 April 2008
Upcoming/Recent NEO Events
Rusty Schweickart
Chairman, ASE-NEO Committee
Tunguska Event Anniversary
US ASAT Shootdown
Peruvian Meteoroid Impact
2007 TU24, 2007 WD5
ASE-NEO Workshops on NEO Deflection
23 April 2008
Emerging Terminology & Concepts
Rusty Schweickart
Chairman, ASE-NEO Committee
- “Path of Risk” now “Risk Corridor”
- JPL t-GT Study for B612 Foundation
- Mitigation Warning
Highlighted by 2007 WD5 approach to Mars
- Deflection Operations
Primary Deflection
Shepherding
Risk
PathCorridor
of Risk
Asteroid Apophis 2036
- “Path of Risk” now “Risk Corridor”
- JPL t-GT Study for B612 Foundation
- Mitigation Warning
Highlighted by 2007 WD5 approach to Mars
- Deflection Operations
Primary Deflection
Shepherding
- “Path of Risk” now “Risk Corridor”
- JPL t-GT Study for B612 Foundation
- Mitigation Warning
Highlighted by 2007 WD5 approach to Mars
- Deflection Operations
Primary Deflection
Shepherding
~50 meters diameter
~12.4 km/sec
~30 meters diameter
5.17/12.29 km/sec
0.66 MT
3.1e-4 impact probability
Nighttime impact
~110 meters diameter
9.48/14.63 km/sec
45 MT
2.7e-8 impact probability
Daytime impact
- “Path of Risk” now “Risk Corridor”
- JPL t-GT Study for B612 Foundation
- Mitigation Warning
Highlighted by 2007 WD5 approach to Mars
- Deflection Operations
Primary Deflection
Shepherding
Total impulse required
7.5e7 newton seconds
5136 kilometers
Primary Deflection =
Miss the Earth
Shepherding =
Guide between keyholes
Total impulse required
1e4 newton seconds
0.6 kilometers
12,840 kilometers
The End
Q&A