Sunspot drawing of 1987-12-15

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https://doi.org/10.7891/e-manuscripta-142771



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1987-12-15
09:30
Hs 1304.6:2078
https://doi.org/10.7891/e-manuscripta-142771
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
146 9 8 B -26 102
147 21 25 C -33 65
148 3 3 A -26 63
149 1 1 A 28 100
4 34 37