Sunspot drawing of 1974-3-21

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https://doi.org/10.7891/e-manuscripta-97698



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1974-03-21
08:00
Hs 1304.5:5319
https://doi.org/10.7891/e-manuscripta-97698
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
28 2 A -15.2 157.1
34 4 J -9.1 54.2
2 6