Sunspot drawing of 1981-6-20

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https://doi.org/10.7891/e-manuscripta-139048



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1981-06-20
07:30
Hs 1304.6:146
https://doi.org/10.7891/e-manuscripta-139048
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
282 10 J -25 107
283 27 D -20 95
284 2 A 5 99
287 4 A -27 50
290 14 D 14 357
5 57