Sunspot drawing of 2004-9-20

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https://doi.org/10.7891/e-manuscripta-152679



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2004-09-20
09:30
Hs 1304.6:7256
https://doi.org/10.7891/e-manuscripta-152679
Observer : Renzo Ramelli
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
152 5 7 D 4.3 349.1
153 16 19 D -13.6 271.8
2 21 26