Tri

Japanese: Tri
Tri

...Its abbreviation is Tri. It is a small autumn constellation located south of Andromeda, with three 3rd magnitude stars forming a long right-angled triangle. It is said to be a constellation since the time of Hipparchus of Greece and to be a symbol of the Nile Delta. The spiral galaxy M33 is an Sc-type galaxy with well-developed arms, with an apparent diameter of 62' x 39', a distance of 2.4 million light years, an apparent brightness of 6.3 magnitude, and its center can be seen with binoculars. Its approximate position is 2h0m in right ascension and +32° in declination. It reaches its culmination at 8pm in mid-December. [Ishida Goro]...

*Some of the terminology explanations that mention "Tri" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…略号はTri。アンドロメダ座の南に位置する秋の小星座で,3個の3等星が細長い直角三角形を描く。ギリシアのヒッパルコスの時代からある星座でナイル川の三角州の象徴であるともいう。渦巻銀河M33は腕のよく発達したSc型の銀河で,視直径62′×39′,距離は240万光年で,見かけの明るさは6.3等,双眼鏡でその中心部を眺めることができる。概略位置は赤経2h0m,赤緯+32゜。午後8時の南中は12月中旬。【石田 五郎】…

※「Tri」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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