Sunspot drawing of 1987-11-20

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https://doi.org/10.7891/e-manuscripta-142928



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1987-11-20
09:00
Hs 1304.6:2062
https://doi.org/10.7891/e-manuscripta-142928
Observer : Sergio Cortesi
Seeing (SIDC) : 1
Group Not Weighted Weighted Type Latitude Carrington Longit.
134 4 25 D -24 117
135 5 35 D -20 59
2 9 60