Sunspot drawing of 1973-8-21

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https://doi.org/10.7891/e-manuscripta-97510



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1973-08-21
07:00
Hs 1304.5:5154
https://doi.org/10.7891/e-manuscripta-97510
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
169 4 B 12.7 343.3
1 4