Sunspot drawing of 1987-8-4

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https://doi.org/10.7891/e-manuscripta-143034



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1987-08-04
07:30
Hs 1304.6:1976
https://doi.org/10.7891/e-manuscripta-143034
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
77 8 13 C 15 121
78 10 15 B -23 46
2 18 28