Sunspot drawing of 1988-2-21

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https://doi.org/10.7891/e-manuscripta-143663



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1988-02-21
09:30
Hs 1304.6:2131
https://doi.org/10.7891/e-manuscripta-143663
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
32 2 12 H 21 328
33 6 6 B -15 317
34 5 5 B 20 316
3 13 23