Sunspot drawing of 1977-9-13

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https://doi.org/10.7891/e-manuscripta-98709



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1977-09-13
07:30
Hs 1304.5:6394
https://doi.org/10.7891/e-manuscripta-98709
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
108 18 D 15.4 204.9
109 42 E 7.2 197.4
2 60