Sunspot drawing of 1990-12-18

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https://doi.org/10.7891/e-manuscripta-145179



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1990-12-18
11:00
Hs 1304.6:3036
https://doi.org/10.7891/e-manuscripta-145179
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
683 16 18 C 3 50
685 12 20 H 20 26
686 50 50 D 16 16
687 13 15 C -5 8
688 32 35 D 13 34
689 2 3 B 17 7
6 125 141