Sunspot drawing of 1987-7-19

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https://doi.org/10.7891/e-manuscripta-142948



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1987-07-19
08:30
Hs 1304.6:1960
https://doi.org/10.7891/e-manuscripta-142948
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
68 2 8 H -31 243
69 2 3 B -27 258
2 4 11