Sunspot drawing of 1974-4-11

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https://doi.org/10.7891/e-manuscripta-97930



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1974-04-11
07:00
Hs 1304.5:5339
https://doi.org/10.7891/e-manuscripta-97930
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
40 68 E -12.3 184.8
41 14 B -5.3 217.3
42 5 B -15.0 164.2
3 87