Sunspot drawing of 1987-4-5

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https://doi.org/10.7891/e-manuscripta-142811



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1987-04-05
09:00
Hs 1304.6:1870
https://doi.org/10.7891/e-manuscripta-142811
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
22 1 3 J 4 296
25 12 15 B -23 179
2 13 18