...Taking these circumstances into consideration, the fundamental star catalog lists the precise positions, proper motions, and precession constants of fundamental stars so that the positions and motions of celestial bodies consistent with a non-rotating inertial system can be given at any moment. The fundamental star catalog currently officially adopted internationally is the Fourth Fundamental Catalogue (also called the FK star catalog, abbreviated as FK4) compiled by the Institute for Astronomical Computation in Heidelberg, which contains 1,535 stars with a long history of precise observation (about 50 years) up to about magnitude 7.5, scattered at a rate of about 1 star per 5° square. This fundamental star catalog lists the precise positions and proper motions of these fundamental stars in 1950.0 and 1975.0. ... *Some of the terminology explanations that refer to the "Fourth Fundamental Catalogue" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このような事情を考慮して,無回転の慣性系において整合性のある天体の位置と運動が任意の瞬間に与えられるように,基本星表においては基本星の精密位置,固有運動および歳差定数が掲げられている。現在,国際的に公式に採用されている基本星表は,ハイデルベルクの天文計算研究所により編纂(へんさん)されたFourth Fundamental Catalogue(FK星表ともいい,略称FK4)であって,約7.5等までの精密観測歴の長い(約50年)恒星1535個が5゜四方に約1個の割合で散布されている。この基本星表には,これらの基本星の1950.0年および1975.0年における精密位置と固有運動などが掲げられている。… ※「Fourth Fundamental Catalogue」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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