Sunspot drawing of 1987-6-20

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https://doi.org/10.7891/e-manuscripta-142831



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1987-06-20
11:45
Hs 1304.6:1933
https://doi.org/10.7891/e-manuscripta-142831
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
58 4 7 C -31 256
59 2 2 B 19 263
2 6 9