Sunspot drawing of 1984-4-20

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https://doi.org/10.7891/e-manuscripta-140933



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1984-04-20
09:45
Hs 1304.6:990
https://doi.org/10.7891/e-manuscripta-140933
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
101 10 21 G 8 143
103 10 15 C -14 80
104 13 19 D 4 152
105 3 6 J -10 40
106 7 5 B -17 90
5 43 66