Sunspot drawing of 1973-2-18

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https://doi.org/10.7891/e-manuscripta-97576



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1973-02-18
08:00
Hs 1304.5:4986
https://doi.org/10.7891/e-manuscripta-97576
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
46 14 D -15.7 306.7
51 1 A -9.5 285.3
54 2 A 17.9 221.5
3 17