Sunspot drawing of 1987-5-1

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https://doi.org/10.7891/e-manuscripta-142972



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1987-05-01
07:00
Hs 1304.6:1894
https://doi.org/10.7891/e-manuscripta-142972
Observer : Michele Bianda
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
39 8 9 B 3 297
40 4 5 B -28 279
41 1 4 J -23 180
3 13 18