Sunspot drawing of 1983-9-17

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https://doi.org/10.7891/e-manuscripta-140528
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1983-09-17
09:45
Hs 1304.6:807
https://doi.org/10.7891/e-manuscripta-140528
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
252 20 26 D -13 61
257 1 1 A 13 74
258 1 3 J -8 335
3 22 30