Sunspot drawing of 1987-12-20

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https://doi.org/10.7891/e-manuscripta-142825



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1987-12-20
10:30
Hs 1304.6:2083
https://doi.org/10.7891/e-manuscripta-142825
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
147 1 5 J -33 64
150 2 2 A -32 49
151 1 1 A 22 19
152 1 2 A -22 123
4 5 10