Sunspot drawing of 1971-5-21

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https://doi.org/10.7891/e-manuscripta-96847
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1971-05-21
13:00
Hs 1304.5:4460
https://doi.org/10.7891/e-manuscripta-96847
Observer : Araldo Pittini
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
149 5 J 4.7 133.5
157 4 A 16.3 59.1
158 2 A 14.4 39.1
160 5 B 12.2 31.4
4 16