Sunspot drawing of 1987-12-31

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https://doi.org/10.7891/e-manuscripta-143016



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1987-12-31
13:15
Hs 1304.6:2093
https://doi.org/10.7891/e-manuscripta-143016
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
153 15 35 E -34 257
155 3 5 C -35 319
2 18 40