Sunspot drawing of 1974-6-18

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https://doi.org/10.7891/e-manuscripta-97733



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1974-06-18
10:30
Hs 1304.5:5400
https://doi.org/10.7891/e-manuscripta-97733
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
88 3 J 6.4 64.7
91 14 H -14.0 351.1
94 1 A -18.7 352.5
3 18