Sunspot drawing of 1987-8-21

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https://doi.org/10.7891/e-manuscripta-142868



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1987-08-21
07:15
Hs 1304.6:1993
https://doi.org/10.7891/e-manuscripta-142868
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
80 1 3 J -27 282
82 15 20 H -30 244
83 8 8 B -23 237
3 24 31