Sunspot drawing of 1988-4-28

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https://doi.org/10.7891/e-manuscripta-143711



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1988-04-28
09:15
Hs 1304.6:2190
https://doi.org/10.7891/e-manuscripta-143711
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
87 1 3 J -18 132
88 21 26 C -19 109
91 2 3 A -22 137
3 24 32