Speaker
Dr
Junichiro Kawaguchi
(JAXA)
Description
This paper presents the extended orbital synthesis results from the author’s work in 2009 to achieve ballistic and short period out-of ecliptic trajectories which possess ultimately the most highly and most concise solar polar properties. Those are realized through almost ballistic flight instead of using electric propulsion or solar sail acceleration. The strategy developed utilizes a Jovian gravity assist first, followed by very high speed synchronized multiple polar gravity assists by Earth or Venus. So far, the use of very high speed gravity assist has been conceived not practically useful to control the trajectory energy. However, this paper presents those still effectively contribute to amending the trajectories periods, in other words, to diminishing the size of them, and lead to acquiring small sized out-of-ecliptic ballistic trajectories. The process simply converts orbital energy associated with highly eccentric ellipses to inclination change. The biggest advantage of this strategy is to reduce propellant mass to be carried drastically, even close to zero, like ballistic flight. While the author’s work in 2009 presented the trajectories down to almost one year period, this paper will present the further sequences that make the semi-major axis lower than one AU and lower the perihelion distance closer to the Sun for close-up observation of the Sun.
| Applicant type | First author |
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Primary author
Dr
Junichiro Kawaguchi
(JAXA)
