Sunspot drawing of 1986-12-4

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https://doi.org/10.7891/e-manuscripta-142171



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1986-12-04
09:00
Hs 1304.6:1770
https://doi.org/10.7891/e-manuscripta-142171
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group