Comparison of Asian national space programs to fuel future energy demands in Asia. All three main Asian space powers plan to send men to the Moon in the distant future and have already sent lunar probes. Japan was the first Asian country to launch a lunar probe. The Hiten (Japanese: "flying angel") spacecraft (known before the launch as MUSES-A), built by the Institute of Space and Astronautical Science of Japan, was launched on 24 January 1990. In many ways, the mission did not go as was planned. Kaguya, the second Japanese lunar orbiter spacecraft, was launched on 14 September 2007. China launched its first lunar probe,
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