N [astronomy] → another name for celestial longitude
You now have the ecliptic longitude of perigee of the sun for the mean summer solstice of your chosen year (and effectively for the entire year).
你现在有黄道经度的近地点的阳光平均夏季冬至，你选择了一年(而有效地为整个一年)。
Finally, it discusses some problems about the longitude difference of ecliptic.
最后，还对《晓庵新法》中黄道距度的问题进行了探讨。
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