Sunspot drawing of 1991-12-17

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https://doi.org/10.7891/e-manuscripta-145793



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1991-12-17
09:00
Hs 1304.6:3337
https://doi.org/10.7891/e-manuscripta-145793
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
642 30 51 E 8 307
651 11 15 C -2 269
651A 8 6 B -9 262
652 11 16 C -17 254
656 11 13 D -17 270
657 12 21 D -10 193
661 9 12 C 22 286
7 92 134