Sunspot drawing of 1999-9-21

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https://doi.org/10.7891/e-manuscripta-150456



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1999-09-21
07:30
Hs 1304.6:5739
https://doi.org/10.7891/e-manuscripta-150456
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
290 14 15 C 12 293
292 9 13 C -21 246
293 4 6 C 20 209
3 27 34