Sunspot drawing of 1987-12-2

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https://doi.org/10.7891/e-manuscripta-142780



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1987-12-02
11:00
Hs 1304.6:2071
https://doi.org/10.7891/e-manuscripta-142780
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
138 3 5 B -22 319
140 3 4 B 30 266
2 6 9