Sunspot drawing of 1987-9-30

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https://doi.org/10.7891/e-manuscripta-143001



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1987-09-30
13:15
Hs 1304.6:2031
https://doi.org/10.7891/e-manuscripta-143001
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
105 5 9 B -21 347
106 4 15 C 33 334
2 9 24