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首页> 外文期刊>Archive for History of Exact Sciences >Muh. yī al-Dīn al-Maghribī's lunar measurements at the Maragha observatory
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Muh. yī al-Dīn al-Maghribī's lunar measurements at the Maragha observatory

机译:嗯yīal-Dīnal-Maghribī在马拉格天文台的月球测量

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This paper is a technical study of the systematic observations and computations made by Muh. yī al-Dīn al-Maghribī (d. 1283) at the Maragha observatory (north-western Iran, c. 1259–1320) in order to newly determine the parameters of the Ptolemaic lunar model, as explained in his Talkhīs. al-majist.ī, "Compendium of the Almagest." He used three lunar eclipses onMarch 7, 1262, April 7, 1270, and January 24, 1274, in order to measure the lunar epicycle radius and mean motions; an observation on April 20, 1264, to determine the lunar eccentricity; an observation on August 29, 1264, to test the model; and another on March 15, 1262, for measuring the lunar parallax. In the second period of activity at the Maragha observatory, Shams al-Dīn Muh.ammad al-Wābkanawī (c. 1254–1320) adopted all of al-Maghribī's parameter values in his Zīj, but decreased his value for the mean longitude of the moon at epoch by 0;13,11°. By comparing the times of the new moons and lunar eclipses in the period of 1270–1320 as computed from the astronomical tables of theMaragha tradition with the true modern ones, it is argued that this correction was very probably the result of actual observations.
机译:本文是对Muh进行的系统观测和计算的技术研究。 yā-Dīnal-Maghribī(卒于1283年)在马拉格天文台(伊朗西北部,约1259–1320年),以便重新确定托勒密月球模型的参数,正如他的Talkhīs所解释的那样。 al-majist.ī,“最聪明的纲要”。他在1262年3月7日,1270年4月7日和1274年1月24日使用了三个月蚀来测量月球行星的半径和平均运动。 1264年4月20日进行观测,以确定月球偏心率; 1264年8月29日进行观测,以测试模型;另一次是在1262年3月15日,用于测量月视差。在Maragha天文台的第二个活动期间,Shamsal-DīnMuh.ammadal-Wābkanawī(约1254–1320年)在他的Zīj中采用了al-Maghribī的所有参数值,但降低了其平均经度的值月亮在纪元0; 13,11°。通过比较从马拉格传统的天文表和真实的现代天文表计算的1270–1320年新月和月蚀的时间,有人认为这种校正很可能是实际观测的结果。

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