Sunspot drawing of 2018-5-23

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https://doi.org/10.7891/e-manuscripta-159998



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2018-05-23
07:30
Hs 1304.6:11221
https://doi.org/10.7891/e-manuscripta-159998
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
13 2 3 B 16
14 2 5 C 6
2 4 8