Sunspot drawing of 1987-5-11

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https://doi.org/10.7891/e-manuscripta-142814



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1987-05-11
08:30
Hs 1304.6:1903
https://doi.org/10.7891/e-manuscripta-142814
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
42 10 14 C -31 117
43 2 2 A -22 83
2 12 16