Sunspot drawing of 1970-4-21

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https://doi.org/10.7891/e-manuscripta-96391



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1970-04-21
07:00
Hs 1304.5:4127
https://doi.org/10.7891/e-manuscripta-96391
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
160 4 J -6.9 281.2
161 3 J -7.4 270.0
167 11 D 19.9 220.7
168 7 B 2.2 277.5
169 4 B 15.9 265.7
170 9 B -9.2 231.1
171 2 B 8.8 230.7
7 40