Sunspot drawing of 1987-9-19

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https://doi.org/10.7891/e-manuscripta-142889



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1987-09-19
07:00
Hs 1304.6:2021
https://doi.org/10.7891/e-manuscripta-142889
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
97 11 16 B -32 226
101 1 3 J 13 133
102 3 4 B -30 194
3 15 23