Sunspot drawing of 1987-9-13

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https://doi.org/10.7891/e-manuscripta-142892



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1987-09-13
07:00
Hs 1304.6:2015
https://doi.org/10.7891/e-manuscripta-142892
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
92 5 6 C -22 341
95 3 2 B -26 274
96 1 1 A 26 248
97 9 11 J -32 229
4 18 20