Sunspot drawing of 1984-4-13

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https://doi.org/10.7891/e-manuscripta-140886



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1984-04-13
07:45
Hs 1304.6:983
https://doi.org/10.7891/e-manuscripta-140886
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
101 18 33 D 9 141
1 18 33