チャイナ (小惑星)

チャイナ
1125 China
仮符号・別名 1957 UN1
分類 小惑星
軌道の種類 小惑星帯
発見
発見日 1957年10月30日
発見者 紫金山天文台
軌道要素と性質
元期:2007年10月27日 (JD 2,454,400.5)
軌道長半径 (a) 3.129 AU
近日点距離 (q) 2.451 AU
遠日点距離 (Q) 3.808 AU
離心率 (e) 0.217
公転周期 (P) 5.54 年
軌道傾斜角 (i) 3.04
近日点引数 (ω) 11.49 度
昇交点黄経 (Ω) 97.20 度
平均近点角 (M) 292.73 度
物理的性質
絶対等級 (H) 11.2
Template (ノート 解説) ■Project

チャイナ[1] (1125 China) は、太陽系小惑星のひとつ。火星木星の間の楕円軌道を公転している。中国語表記は「中華」。

命名

“China”とは中国英語表記である。1928年中国人張鈺哲(1902年 - 1986年)によって小惑星1928 UFが発見され「中国」と命名されたが、その後1928 UFは永らく観測されなかった(現在では軌道が確定し小惑星番号が登録されないと命名できないため、こうしたことは起こり得ない)。1957年、小惑星1957 UN1が中国南京にある紫金山天文台によって発見されたが、発見者たちは「1928 UFを再発見した」と誤認し、かつて張によって命名された名称「中国」を使用して“1125 China”として登録した。

しかし1986年になり1928 UFが本当に再発見されたことで、1957年の再発見は誤りであったことが証明されたが、本来のChinaの名称は既に1957 UN1に使用されていたため、1928 UFについては別途中国語標準語である北京語マンダリン)による中国(ツォングオ)のローマ字表記 (Zhōng guó) を使用し、“3789 Zhongguo”と命名されることになったのである。

出典

  1. ^ 全世界の観測成果 ver.2” (Excel). 薩摩川内市せんだい宇宙館 (2018年3月3日). 2019年3月11日閲覧。

関連項目

外部リンク


前の小惑星
ストローバンティア (小惑星)
小惑星
チャイナ (小惑星)
次の小惑星
オテロ (小惑星)

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