Sunspot drawing of 1986-4-21

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https://doi.org/10.7891/e-manuscripta-142142



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1986-04-21
08:00
Hs 1304.6:1572
https://doi.org/10.7891/e-manuscripta-142142
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
18 1 1 A -9 174
19 6 8 J 0 172
20 1 1 A -1 163
3 8 10