Sunspot drawing of 1987-12-13

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https://doi.org/10.7891/e-manuscripta-143011



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1987-12-13
09:00
Hs 1304.6:2076
https://doi.org/10.7891/e-manuscripta-143011
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
146 3 3 B -26 104
147 1 5 H -33 68
2 4 8