Sunspot drawing of 1987-4-6

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https://doi.org/10.7891/e-manuscripta-142864



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1987-04-06
09:00
Hs 1304.6:1871
https://doi.org/10.7891/e-manuscripta-142864
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
22 1 3 J 4 297
25 30 38 D -23 180
26 4 8 C -30 136
3 35 49