Sunspot drawing of 1987-7-31

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https://doi.org/10.7891/e-manuscripta-142838



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1987-07-31
07:30
Hs 1304.6:1972
https://doi.org/10.7891/e-manuscripta-142838
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
70 6 10 B -22 178
74 15 19 C 29 142
75 6 8 B -28 175
76 3 2 A 21 148
77 10 14 B 15 119
5 40 53