International Celestial Reference System

International Celestial Reference System

[1] 国際天文基準座標系 - Wikipedia () <https://ja.wikipedia.org/wiki/%E5%9B%BD%E9%9A%9B%E5%A4%A9%E6%96%87%E5%9F%BA%E6%BA%96%E5%BA%A7%E6%A8%99%E7%B3%BB>