Japan Station: the Japanese Experiment Module (Kibo) was added to the station during Space Shuttle assembly flights in 2008. The space probe "Akatsuki" was launched May 20, 2010, and achieved orbit around Venus on December 9, 2015. Japan's plans in space exploration include: developing the "Mercury Magnetospheric Orbiter" to be launched in 2018; and building a moon base by 2030. On September 14, 2007, it launched lunar explorer SELENE (Selenological and Engineering Explorer) on a H-IIA (Model H2A2022) carrier rocket from Tanegashima Space Center. SELENE is also known as Kaguya, after the lunar princess of "The Tale of the Bamboo Cutter".
Orbital station-keeping track it is also necessary to make out-of-plane manoeuvres to compensate for the inclination change caused by Sun/Moon gravitation. These are executed as thruster burns orthogonal to the orbital plane. For Sun-synchronous spacecraft having a constant geometry relative to the Sun, the inclination change due to the solar gravitation is particularly large; a delta-v in the order of 1–2 m/s per year can be needed to keep the inclination constant. For geostationary spacecraft, thruster burns orthogonal to the orbital plane must be executed to compensate for the effect of the lunar/solar gravitation that perturbs the orbit pole with typically 0.85