Sunspot drawing of 1987-1-1

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https://doi.org/10.7891/e-manuscripta-142860



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1987-01-01
10:45
Hs 1304.6:1794
https://doi.org/10.7891/e-manuscripta-142860
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
1 9 21 C 6 13
1 9 21