Sunspot drawing of 1984-7-20

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https://doi.org/10.7891/e-manuscripta-140916



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1984-07-20
07:30
Hs 1304.6:1070
https://doi.org/10.7891/e-manuscripta-140916
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
172 2 4 B 10 42
174 1 3 A -7 313
2 3 7