Sunspot drawing of 1987-6-17

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https://doi.org/10.7891/e-manuscripta-142787



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1987-06-17
07:45
Hs 1304.6:1931
https://doi.org/10.7891/e-manuscripta-142787
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
56 2 4 B -5 350
57 3 2 A 32 324
2 5 6