Sunspot drawing of 1986-1-21

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https://doi.org/10.7891/e-manuscripta-142109



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1986-01-21
08:30
Hs 1304.6:1509
https://doi.org/10.7891/e-manuscripta-142109
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group