Sunspot drawing of 1987-5-28

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https://doi.org/10.7891/e-manuscripta-142999



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1987-05-28
08:30
Hs 1304.6:1915
https://doi.org/10.7891/e-manuscripta-142999
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
47 2 6 D 29 338
50 11 17 C 22 252
2 13 23