We have located a forgotten record of sunspot observations made by Jean Charles Gallet in the year 1677, in the middle of the Maunder Minimum (the period between 1645 and 1715 characterized by very low solar activity). Gallet observed one sunspot group from April 9 to 15 and another from October 1 to 6. While the group observed in April was also recorded by other astronomers of that time, no observer recorded the group observed by Gallet in 1677 October. Moreover, Gallet indicated the latter group was composed by four different spots and provided astrometric measurements of the main spot. We have calculated the latitudes corresponding to the main sunspot recorded in the October. The mean latitude is around 10º south. Therefore, this sunspot was observed in the southern hemisphere, as were most of the spots observed during the Maunder Minimum.

中文翻译：

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蒙德极小期期间被遗忘的太阳黑子记录（Jean Charles Gallet，1677）

我们找到了让·查尔斯·加勒 (Jean Charles Gallet) 于 1677 年在蒙德极小期（1645 年至 1715 年之间的太阳活动非常低的时期）进行的太阳黑子观测记录。加莱特在 4 月 9 日至 15 日和 10 月 1 日至 6 日观察到了一个太阳黑子群。虽然当时其他天文学家也记录了 4 月观测到的太阳黑子群，但没有观察者记录到 1677 年 10 月加莱特观测到的太阳黑子群。此外，Gallet 指出后一组由四个不同的点组成，并提供了主要点的天体测量。我们计算了 10 月份记录的主要太阳黑子对应的纬度。平均纬度在南纬 10º 左右。因此，这个太阳黑子是在南半球观测到的，就像在蒙德极小期观测到的大多数黑子一样。