Sunspot drawing of 1997-4-3

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https://doi.org/10.7891/e-manuscripta-149612



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1997-04-03
08:00
Hs 1304.6:4956
https://doi.org/10.7891/e-manuscripta-149612
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
18 8 13 C -23 294
19 15 17 D -22 287
20 3 7 C -28 211
3 26 37