Sunspot drawing of 1988-2-17

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https://doi.org/10.7891/e-manuscripta-143832



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1988-02-17
08:45
Hs 1304.6:2127
https://doi.org/10.7891/e-manuscripta-143832
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
32 3 10 H 21 329
33 7 10 B -14 319
34 8 9 C 19 317
3 18 29