Sunspot drawing of 1972-9-21

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https://doi.org/10.7891/e-manuscripta-97134



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1972-09-21
07:00
Hs 1304.5:4870
https://doi.org/10.7891/e-manuscripta-97134
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
310 2 A -8.5 166.8
311 6 B 7.1 153.3
313 6 A -11.1 115.2
314 4 J -15.9 80.0
316 16 C -6.1 36.8
317 8 C -4.3 27.8
6 42