Sunspot drawing of 1988-5-20

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https://doi.org/10.7891/e-manuscripta-143763



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1988-05-20
10:15
Hs 1304.6:2206
https://doi.org/10.7891/e-manuscripta-143763
Observer : Michele Bianda
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
108 4 6 C -18 280
110 1 2 A -18 141
2 5 8