Sunspot drawing of 1987-6-23

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https://doi.org/10.7891/e-manuscripta-142891



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1987-06-23
07:00
Hs 1304.6:1936
https://doi.org/10.7891/e-manuscripta-142891
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
58 5 6 J -31 255
59 28 37 C 20 261
60 1 1 A 13 223
3 34 44