Low Cost Multiple Near Earth Object Missions

Details Low Cost Multiple Near Earth Object Missions Low Cost Multiple Near Earth Object Missions

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p43a1427s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #P43A-1427

Other

[6000] Planetary Sciences: Comets And Small Bodies, [6094] Planetary Sciences: Comets And Small Bodies / Instruments And Techniques, [6205] Planetary Sciences: Solar System Objects / Asteroids, [6206] Planetary Sciences: Solar System Objects / Asteroids: Satellites

Scientific paper

Commercial spacecraft are available with efficient high power solar arrays and hybrid propulsion systems (Chemical and Solar Electric) that make possible multiple Near Earth Object Missions within Discovery budget limits. Our analysis is based on the Geosynchronous Transfer Orbit Capability (GTOC-3) solution. GTOC-3 assumptions: - Escape from Earth, rendezvous with 3 asteroids, then rendezvous with Earth - Departure velocity below 0.5 km/s - Launch between 2016 and 2025 - Total trip time less than 10 years - Minimum stay time of 60 days at each asteroid - Initial spacecraft mass of 2,000 kg - Thrust of 0.15 N and Isp of 3,000 s - Only Earth GAMs allowed (Rmin = 6,871 km) Preliminary results indicate that for mission objectives we can visit Apophis and any other 2 asteroids on this list or any other 3 asteroids listed. We have considered two spacecraft approaches to accomplish mission objectives: - Case 1: Chemical engine burn to the 1st target, and then solar electric to the 2nd and 3rd targets, or - Case 2: Solar electric propulsion to all 3 targets For both Cases, we assumed an instrument mass of up to 100 kg, power up to 100 W, and s/c bus pointing as good as 12 arc sec.Multi-NEO Mission Candidates

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