Sunspot drawing of 1987-3-24

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https://doi.org/10.7891/e-manuscripta-142930
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1987-03-24
08:00
Hs 1304.6:1861
https://doi.org/10.7891/e-manuscripta-142930
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
20 9 15 C 23 78
1 9 15