Sunspot drawing of 1986-4-20

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https://doi.org/10.7891/e-manuscripta-142090



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1986-04-20
08:00
Hs 1304.6:1571
https://doi.org/10.7891/e-manuscripta-142090
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
19 3 7 J 0 172
20 1 1 A -1 163
2 4 8