Sunspot drawing of 1987-6-18

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https://doi.org/10.7891/e-manuscripta-142933



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1987-06-18
09:00
Hs 1304.6:1932
https://doi.org/10.7891/e-manuscripta-142933
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
55 1 1 A 24 334
56 3 4 B -5 350
57 2 2 A 30 324
58 4 6 C -31 255
4 10 13