Sunspot drawing of 1974-6-21

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https://doi.org/10.7891/e-manuscripta-97812



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1974-06-21
07:45
Hs 1304.5:5403
https://doi.org/10.7891/e-manuscripta-97812
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
91 13 C -14.2 350.2
95 2 A 9.2 290.5
2 15