Sunspot drawing of 1987-4-24

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https://doi.org/10.7891/e-manuscripta-143044



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1987-04-24
07:15
Hs 1304.6:1887
https://doi.org/10.7891/e-manuscripta-143044
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
37 3 2 A -25 1
38 8 13 C 27 31
39 2 4 J 4 298
40 2 2 A 12 301
4 15 21