Sunspot drawing of 1987-3-28

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https://doi.org/10.7891/e-manuscripta-142851



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1987-03-28
17:00
Hs 1304.6:1864
https://doi.org/10.7891/e-manuscripta-142851
Observer : Marco Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
22 1 3 J 5 295
1 1 3