Sunspot drawing of 1987-9-4

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https://doi.org/10.7891/e-manuscripta-142785



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1987-09-04
07:30
Hs 1304.6:2006
https://doi.org/10.7891/e-manuscripta-142785
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
91 2 3 A -24 4
92 29 39 C -22 342
2 31 42