Sunspot drawing of 1987-4-7

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https://doi.org/10.7891/e-manuscripta-143048



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1987-04-07
07:30
Hs 1304.6:1872
https://doi.org/10.7891/e-manuscripta-143048
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
25 27 42 D -23 180
26 1 3 J -30 132
27 4 11 D -33 137
28 5 5 B -24 205
4 37 61