Sunspot drawing of 1988-1-31

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https://doi.org/10.7891/e-manuscripta-143616
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1988-01-31
09:00
Hs 1304.6:2114
https://doi.org/10.7891/e-manuscripta-143616
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
18 3 3 A -30 266
21 13 19 B 17 218
22 2 7 G 18 173
23 4 7 C 21 153
24 2 4 B -28 159
5 24 40