Sunspot drawing of 1987-3-23

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https://doi.org/10.7891/e-manuscripta-142830



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1987-03-23
09:30
Hs 1304.6:1860
https://doi.org/10.7891/e-manuscripta-142830
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
20 17 23 C 23 78
21 2 2 A -21 22
2 19 25