Sunspot drawing of 1987-1-7

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https://doi.org/10.7891/e-manuscripta-142781



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1987-01-07
09:15
Hs 1304.6:1800
https://doi.org/10.7891/e-manuscripta-142781
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
1 2 3 B 5 13
2 4 3 B -25 330
2 6 6