Sunspot drawing of 1987-12-1

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https://doi.org/10.7891/e-manuscripta-142888



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1987-12-01
10:15
Hs 1304.6:2070
https://doi.org/10.7891/e-manuscripta-142888
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
138 7 9 B -22 318
140 1 1 A 30 269
2 8 10