Sunspot drawing of 1972-9-13

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https://doi.org/10.7891/e-manuscripta-96977



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1972-09-13
09:30
Hs 1304.5:4864
https://doi.org/10.7891/e-manuscripta-96977
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
307 5 C 19.7 240.7
308 15 D -11.9 186.5
310 6 C -10.1 160.2
3 26