Sunspot drawing of 1987-9-23

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https://doi.org/10.7891/e-manuscripta-142810



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1987-09-23
11:15
Hs 1304.6:2025
https://doi.org/10.7891/e-manuscripta-142810
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
101 2 4 J 13 133
102 1 3 J -29 190
103 1 2 A -21 70
3 4 9