Sunspot drawing of 1987-8-28

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https://doi.org/10.7891/e-manuscripta-142938



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1987-08-28
07:45
Hs 1304.6:1999
https://doi.org/10.7891/e-manuscripta-142938
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
88 10 8 B 16 123
90 1 3 J -23 49
2 11 11