Sunspot drawing of 1987-3-18

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https://doi.org/10.7891/e-manuscripta-142768



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1987-03-18
09:45
Hs 1304.6:1855
https://doi.org/10.7891/e-manuscripta-142768
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
17 2 3 A -32 76
19 4 4 B -19 122
2 6 7