Sunspot drawing of 1987-4-30

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https://doi.org/10.7891/e-manuscripta-142921



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1987-04-30
07:00
Hs 1304.6:1893
https://doi.org/10.7891/e-manuscripta-142921
Observer : Michele Bianda
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
39 4 5 J 4 299
40 7 7 C -28 281
41 3 4 J -24 181
3 14 16