Sunspot drawing of 1984-4-18

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https://doi.org/10.7891/e-manuscripta-140939



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1984-04-18
08:15
Hs 1304.6:988
https://doi.org/10.7891/e-manuscripta-140939
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
101 22 33 D 8 141
103 17 19 C -16 84
104 5 7 C 4 152
105 1 4 J -11 40
4 45 63