Sunspot drawing of 1986-4-18

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https://doi.org/10.7891/e-manuscripta-142196



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1986-04-18
13:00
Hs 1304.6:1569
https://doi.org/10.7891/e-manuscripta-142196
Observer : Sergio Cortesi
Seeing (SIDC) :
Group Not Weighted Weighted Type Latitude Carrington Longit.
18 1 1 A -9 173
19 2 6 J 1 172
2 3 7