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'Minerva' mini-probe asteroid landing has failed



 
 
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  #1  
Old November 12th 05, 04:17 PM
Jim Oberg
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Default 'Minerva' mini-probe asteroid landing has failed

Can anyone compute the actual 'escape velocity' of Itokawa?


"Jim Oberg" wrote
Minerva's mission to land on the asteroid Itokawa has failed.



  #2  
Old November 12th 05, 04:28 PM
Jim Oberg
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Default Itokawa escape velocity

Disregard my last posted question -- here's the answer:

THE HAYABUSA ASTEROID SAMPLE RETURN MISSION. H. Yano, Dept. of Planetary
Science, Japan Aerospace Exploration Agency (JAXA)/Institute of Space and
Astronautical Science (ISAS) 3-1-1 Yoshinodai, Sagamihara, Kanagawa,
229-8510, JAPAN

http://www.lpi.usra.edu/meetings/am2005/pdf/7030.pdf

"Assuming a bulk density of ordinary chondrites, the surface gravity of
Itokawa is on the order of 10 micro-G, with an

escape velocity = 20 cm/s."



What was a station-keeping spacecraft DOING at that speed?


 




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