Sunspot drawing of 1987-3-22

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https://doi.org/10.7891/e-manuscripta-142908



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1987-03-22
10:15
Hs 1304.6:1859
https://doi.org/10.7891/e-manuscripta-142908
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
20 10 15 C 23 78
1 10 15