Sunspot drawing of 1987-4-2

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https://doi.org/10.7891/e-manuscripta-142983



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1987-04-02
07:45
Hs 1304.6:1869
https://doi.org/10.7891/e-manuscripta-142983
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
22 5 6 C 4 294
23 1 1 A 11 290
24 1 1 A 21 265
3 7 8