Sunspot drawing of 1971-9-4

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https://doi.org/10.7891/e-manuscripta-96783



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1971-09-04
10:45
Hs 1304.5:4562
https://doi.org/10.7891/e-manuscripta-96783
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
259A 16 D -6.1 120.2
260 2 A 17.1 100.2
2 18