春の大曲線

春の大曲線（はるのだいきょくせん）は、春の夜空に見られる明るい恒星の並び（アステリズム）。

春の大曲線 : 北斗七星(左上)の柄杓カーブを延ばした(矢印)先にアークトゥルス、さらに延ばせばスピカがある。

春になると、おおぐま座にある北斗七星が上方経過となり天頂近くに高くのぼる。そのひしゃくの柄のカーブを柄の端の星（η星）の方へ延ばしていくと、 うしかい座のα星で1等星のアークトゥルス、そのまま続けてカーブを伸ばすとおとめ座のα星でやはり1等星のスピカに届く。さらに伸ばすと曲線はからす座に至る[1][2]。

この呼び名を考案したのは日本の天文学者鈴木敬信である[3][4]。また五島プラネタリウム元解説員の金井三男は、金井がからす座まで延長したと述べている[4]。

出典

[脚注の使い方]
  1. ^ 野尻抱影『星三百六十五夜』（（初回限定版））中央公論社、1955年、142頁頁。 
  2. ^ “春の星空を楽しもう”. AstroArts. 2013年5月11日閲覧。
  3. ^ 原恵『星座の神話 - 星座史と星名の意味』（新装改訂）恒星社厚生閣、1996年6月30日、67頁。ISBN 978-4-7699-0825-8。 
  4. ^ a b 金井三男 (2014年5月16日). “第151夜「春の大曲線を見よう」”. 2016年6月5日閲覧。

関連項目

アステリズム（星群）
アラスカ州の州旗
カテゴリ カテゴリ
スタブアイコン

この項目は、天文学（天文学者を含む）や地球以外の天体に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めています（プロジェクト:天体／Portal:天文学）。

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