Orbit Synthesis for Hayabusa-2 and Marco Polo (Hayabusa mk-II) Primitive Bodies Sample & Return Missions

Paper number

IAC-08.C1.2.9

Author

Dr. Junichiro Kawaguchi, Japan Aerospace Exploration Agency (JAXA), Japan

Coauthor

Dr. Mutsuko Morimoto, Japan Aerospace Exploration Agency (JAXA), Japan

Coauthor

Dr. Yasuhiro Kawakatsu, Japan Aerospace Exploration Agency (JAXA), Japan

Coauthor

Mr. Masatoshi Matsuoka, NEC Aerospace Systems, Ltd., Japan

Year

2008

Abstract

Taking the advantage of the experiences and technologies via the successful Hayabusa mission, the Japan Aerospace Exploration Agency (JAXA) is currently studying the Hayabusa-follow-on missions to more primitive bodies. Hayabusa-2 is a replica to the Hayabusa spacecraft and will be ready for quick flight in less than four years, as the development may skip the Engineering Model phase. It will go to a C-type asteroid, while Hayabusa visited an S-type asteroid, Itokawa. And Hayabusa mk-II is much larger spacecraft, three times as large as Hayabusa, and it may go to an extinct comet, Wilson-Harrington. The Cosmic Vision program recently selected an ESA and JAXA joint mission named Marco Polo, which is the combined mission of this Hayabusa mk-II with a lander provided from Europe. Marco Polo is currently undergoes the Phase-A study at both agencies.
The paper presents the orbit optimization synthesis for both follow-on missions. Both the spacecraft are propelled by the ion engines and the trajectory analysis results through an optimization process trying to reduce Xe-gas amount consumed. 
This trajectory synthesis also utilizes what we call the EDVEGA (Electric Delta-V Earth Gravity Assist) technique to accumulate the orbit energy as the form of orbital angular momentum, while the spacecraft flies at almost Earth distance so that the solar electricity can be obtained well. The paper introduces that the combination EDVEGA   strategy comprising the Earth gravity assist and the low thrust propulsion is essential.

Abstract document

IAC-08.C1.2.9.pdf

Manuscript document

IAC-08.C1.2.9.pdf (🔒 authorized access only).

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