Calendar study - Rekisho Kousei

Japanese: 暦象考成 - れきしょうこうせい
Calendar study - Rekisho Kousei

A calendar book from the Qing dynasty in China. There are two versions, "Upper and Lower Volumes" and "Later Volumes." "Upper and Lower Volumes" is a re-edited version of "New Western Calendar" by He Guozong and Mei Gucheng, and was compiled as an imperial project by the Qing emperor Kangxi. It is part of the 100 volumes of "Origin of the Law Calendar" and was published in 1723. It describes the theory of Tycho Brahe and the calendar calculations based on it. The "Shixian calendar" of the Qing dynasty, estimated in "Upper and Lower Volumes," gradually began to show slight differences, and the calendar book "Later Volumes of the Calendar" was compiled in 1742 by the Jesuit priest Koegler (Chinese name Dai Jinxian) and others at the imperial command of the Qing emperor Gaozong. This work incorporated Kepler's theory of elliptical motion for the sun and moon, but did not extend to the planets. The Rekisho Kosei was studied by calendar scholars of the Asada Goryu school during the Edo period, and the latter half in particular was the focus of the Asada school's efforts, becoming the basis for the Kansei calendar.

[Toshio Watanabe]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

中国、清(しん)代の暦算書。『上下編』と『後編』の2種ある。『上下編』は何国宗(かこくそう)・梅穀成(ばいこくせい)により『西洋新法暦書』を再編したもので、清の康煕帝(こうきてい)の勅撰(ちょくせん)事業として編纂(へんさん)された。『律暦淵源(えんげん)』100巻の一部をなすもので、1723年刊行された。ティコ・ブラーエの学説とそれに基づく暦算を述べたものである。『上下編』で推算される清朝の「時憲暦」もしだいに微差を生じるようになり、清の高宗の勅命を受けてイエズス会士ケーグラー(中国名、戴進賢(たいしんけん))らが1742年に編纂した暦法書が『暦象考成後編』である。これではケプラーの楕円(だえん)運動説を太陽・月に取り入れたが、惑星にまでは及ばなかった。『暦象考成』は江戸時代、麻田剛立(ごうりゅう)一派の暦学者により研究され、ことに『後編』は麻田派の力を注いだものであり、「寛政暦(かんせいれき)」の基となった。

[渡辺敏夫]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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