Sunspot drawing of 1984-9-13

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https://doi.org/10.7891/e-manuscripta-141160



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1984-09-13
06:45
Hs 1304.6:1120
https://doi.org/10.7891/e-manuscripta-141160
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group