论文标题
1703年在罗马的圣玛丽亚·德格利·安吉利(St. Maria degli Angeli)的子午线和小天狼星的恒星畸变
Solstices and Equinoxes in 1703 at the meridian line of St. Maria degli Angeli in Rome, and the stellar aberration of Sirius
论文作者
论文摘要
1703年是在罗马圣玛丽亚·德格利·安吉利大教堂的子午线全面运作的第一年。通过比较日常的Sun和Sirius的过境时机(同样在白天)通过比较Sirius(相互关系效应)的Sirius的恒星(几何效应)的东部偏差,可以通过比较太阳和Sirius的过境时间,这是由Meridian Line的东部偏差(相互效应)的东部偏差(与白天的东部偏差)的影响。同样,在这里,根据黄铜纬度的恒星像差,在这里观察到的小天狼星偏斜的季节性转变。可以测量地球轨道的偏心率以及空间中其轴的方向,因为托勒密通过知道溶解剂的确切时机和春分的时间。弗朗切斯科·比安奇尼(Francesco Bianchini)在当地的罗马人的平均时间中发表了1703年的春分和溶解度的日期,提到了当地(罗马)平均中午,即在太阳经络平均过境时间之后。通过使用1703年的三个月食的观察,我们发现了那年的时间方程,以及UTC的相应时间季节开始的时间。该操作导致发现了小天狼星异常对Bianchini在IMCCE当前的天体机械模型相对于Bianchini计算的即时的贡献。
The 1703 was the first year of full operation of the meridian line in the Basilica of St. Maria degli Angeli in Rome. The instants of solstices and equinoxes, the \textit{Anni Cardines}, obtained by comparing transit timings of Sun and Sirius, also in daytime, are affected either by the East deviation of the meridian line of about 5' Eastward (geometrical effect), either by the stellar aberration of Sirius (relativistic effect). Similarly the seasonal shifts of Sirius' declination observed by Bianchini are here firstly recognized as depending on the stellar aberration in ecliptic latitude. The eccentricity of the Earth's orbit and the orientation of its axis in the space can be measured, since Ptolemy, by knowing the exact timing of the solstices and the equinoxes. The dates of 1703 equinoxes and solstices have been published by Francesco Bianchini in local roman mean time, referred to the local (roman) mean noon, i.e. after the solar meridian mean transit time. By using the observations of the three lunar eclipses of 1703 we found the equation of time for that year, and the UTC corresponding timings of the beginning of the seasons. This operation lead to find the contribution of the Sirius aberration to the instant calculated by Bianchini with respect to the current celestial mechanical models of IMCCE.