Sunspot drawing of 1987-7-28

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https://doi.org/10.7891/e-manuscripta-143054



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1987-07-28
07:30
Hs 1304.6:1969
https://doi.org/10.7891/e-manuscripta-143054
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
68 1 3 J -32 241
70 8 13 C -23 183
73 3 4 B -21 189
74 23 26 D 29 144
75 8 8 B -22 176
5 43 54