Sunspot drawing of 1987-9-11

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https://doi.org/10.7891/e-manuscripta-143057



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1987-09-11
07:15
Hs 1304.6:2013
https://doi.org/10.7891/e-manuscripta-143057
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
92 22 31 D -22 340
95 12 7 B -26 276
96 7 9 B 27 249
97 3 6 J -32 231
4 44 53