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Kaguya (SELENE) tracking data
The Kaguya mission, which is named after a legendary princess from Moon
(Kaguya-hime), was composed of the three orbiters,
Main (Kaguya), Rstar (Okina) and Vstar (Ouna).
Okina and Ouna means "ground-uncle" and "ground-aunt" in
Okina and Ouna rotates around Moon above Kaguya, which is a remembrance
of the scene that Okina and Ouna are affectionate to Kaguya-hime.
These tracking data are valuable to measure gravitational field of Moon more
precisely than ever. (2012 June)