Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995acaau..35..633k&link_type=abstract
Acta Astronaut. (UK), Vol. 35, No. 9 - 11, p. 633 - 642
Astronomy and Astrophysics
Astronomy
5
Space Missions: Moon, Space Missions: Mars
Scientific paper
ISAS, the Institute of Space and Astronautical Science, Japan, is currently planning to launch the LUNAR-A spacecraft to the Moon in 1997 and the PLANET-B spacecraft toward Mars in 1998. ISAS have been studying how to make good use of lunar and solar gravity effects in order to increase the scientific payload as much as possible. In the LUNAR-A mission, the current orbital sequence uses one lunar swingby in which the spacecraft can be thrown toward the sphere of influence boundary for the purpose of acquiring solar gravity assist. This sequence enables the approach velocity to the Moon to be diminished drastically. In the PLANET-B mission, use of lunar and solar gravity assist can help in boosting the increase in velocity and saving the amount of fuel. The sequence discussed involves two lunar swingbys to accelerate spacecraft enough to exceed the escape velocity.
Kawaguchi Jun'ichiro
Matsuo Hiroshi
Uesugi Tomoko
Yamakawa Hiroshi
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