Sunspot drawing of 1987-9-15

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https://doi.org/10.7891/e-manuscripta-142883



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1987-09-15
07:00
Hs 1304.6:2017
https://doi.org/10.7891/e-manuscripta-142883
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
96 3 3 A 27 248
97 10 12 C -32 229
98 1 1 A 1 287
99 2 2 B 18 219
4 16 18