Sunspot drawing of 1987-8-18

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https://doi.org/10.7891/e-manuscripta-143035



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1987-08-18
07:15
Hs 1304.6:1990
https://doi.org/10.7891/e-manuscripta-143035
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
80 3 8 C -26 280
82 4 12 H -30 246
83 15 24 D -23 238
86 3 2 B 19 227
4 25 46