Smithsonian Astrophysical Observatory

Japanese: Smithsonian Astrophysical Observatory（英語表記）SmithsonianAstrophysicalObservatory

...Some of the most well-known museums are the National Museum of Natural History, the National Museum of Science and Technology, the National Air and Space Museum, and the National Collection of Fine Arts. In addition, there are various research institutes scattered throughout the United States, such as the Smithsonian Astrophysical Observatory and the Radiation Biology Laboratory. The Smithsonian Press publishes academic and technical books, magazines, and pamphlets, as well as many educational publications.

From the Star Catalog

...The first edition of the AGK1 star catalog was published in 1890-1910 and included 144,000 stars. Later, the latitude band was expanded and the accuracy of proper motion was improved. The third edition, AGK3, was compiled in the 1960s, and eventually 200,000 stars were included in the FK4 catalog. The SAO star catalog (short for Smithsonian Astrophysical Observatory) is a star catalog that was selected from the AGK2 and Cape Observatory latitude band catalogs with the aim of a uniform distribution of stars across the sky to serve as a standard for satellite photographic observations. It includes 259,000 stars, and its positions and proper motions are in accordance with FK4, with an accuracy of ±0.1. It also includes spectral types....

*Some of the terms mentioned in the "Smithsonian Astrophysical Observatory" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…代表的なものを列挙すると，自然史博物館National Museum of Natural History，科学技術博物館National Museum of Science and Technology，航空宇宙博物館National Air and Space Museum，美術館National Collection of Fine Artsなどである。また，天体物理学研究所Smithsonian Astrophysical Observatory，放射線生物学研究所Radiation Biology Laboratoryなど各種の研究所がアメリカ各地に散在している。スミソニアン出版局Smithsonian Pressは，学術的･専門的な書物や雑誌･パンフレットのほか，啓蒙的な性格の出版物も数多く刊行している。…

【星表】より

…初版AGK1星表は1890‐1910年に出版，14.4万の星を記載，のちに緯度帯を拡張し，また固有運動の精度を向上して1960年代には第3版AGK3星表が編纂（へんさん）され，結局20万の星がFK4に準拠して記載された。SAO星表(Smithsonian Astrophysical Observatoryの略)は人工衛星の写真観測の基準とするために，星の全天一様な分布を目標としてAGK2とケープ天文台の緯度帯カタログから星を選んだ星表で，25.9万の星を記載し，位置と固有運動はFK4に準拠し，精度±0.″1を目標とする。またスペクトル型も記載してある。…

※「Smithsonian Astrophysical Observatory」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。

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