Sunspot drawing of 1961-9-21

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https://doi.org/10.7891/e-manuscripta-92675



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1961-09-21
06:30
Hs 1304.5:1470
https://doi.org/10.7891/e-manuscripta-92675
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
267 9 10 C 14.7 283.7
272 8 6 C 18.2 206.0
275 7 10 D 4.0 246.9
276 4 3 B 6.9 186.9
4 28 29