Sunspot drawing of 1987-7-16

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https://doi.org/10.7891/e-manuscripta-142852



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1987-07-16
09:00
Hs 1304.6:1958
https://doi.org/10.7891/e-manuscripta-142852
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
67 2 2 A 27 32
68 2 8 C -33 242
2 4 10