Digital images of manuscripts stored in the Galilean collection of the Central National Library of Florence are analyzed to obtain sunspot groups, their areas and heliographic positions. Overall, 142 drawings were processed. The way of drawing is usually schematic resulting in area uncertainty which may exceed a factor of two for small sunspots. We suggest that there is an upper limit of a factor of two between sunspot group numbers from the drawings and the actual ones. The computed penumbra-to-umbra ratio is consistent with modern observations. A distribution of sunspot latitudes versus time is reconstructed by means of two methods: exploiting the observation time noted by an observer and minimizing the day-to-day variability of sunspot latitudes.

中文翻译：

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Cigoli、Galilei、Cologna、Scheiner 和 Colonna 在 1612-1614 年观测的太阳黑子位置和区域

对保存在佛罗伦萨中央国家图书馆伽利略收藏中的手稿的数字图像进行分析，以获得太阳黑子群、它们的区域和日光位置。总共处理了 142 张图纸。绘制方式通常是示意性的，导致面积不确定性可能超过小太阳黑子的两倍。我们建议图中的太阳黑子群数与实际数之间存在两倍的上限。计算出的半影与本影之比与现代观测结果一致。太阳黑子纬度随时间的分布通过两种方法重建：利用观察者记录的观测时间和最小化太阳黑子纬度的日常变化。