A star catalogue that defines the fundamental coordinate system for describing the positions and movements of celestial bodies on the celestial sphere. It lists the precise positions, proper motions, and precession constants of fundamental stars that serve as the fundamental positions on the celestial sphere. The official fundamental star catalogue that is adopted internationally contains 1,535 stars with a long history of precise observation up to about magnitude 7.5, scattered at a rate of about 1 star per 5° square. The Fourth Fundamental Catalogue. This is abbreviated as FK4 and is also called the FK star catalogue. Source : Heibonsha Encyclopedia About MyPedia Information |
天球面上での天体の位置と運動を記述するための基本座標系を定義するための星表。天球面上での基本位置となる基本星の精密位置,固有運動,歳差定数を掲げたもので,国際的に採用されている公式の基本星表は,約7.5等までの精密観測歴の長い恒星1535個が5°四方に約1個の割合で散布されている。Fourth Fundamental Catalogue。これはFK4と略称され,FK星表とも呼ばれている。
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