Sunspot drawing of 1987-12-25

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https://doi.org/10.7891/e-manuscripta-142958



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1987-12-25
14:00
Hs 1304.6:2088
https://doi.org/10.7891/e-manuscripta-142958
Observer : Marco Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
147 2 3 J -35 61
153 7 17 D -33 259
2 9 20