Sunspot drawing of 1971-9-10

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https://doi.org/10.7891/e-manuscripta-96833



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1971-09-10
10:30
Hs 1304.5:4567
https://doi.org/10.7891/e-manuscripta-96833
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
260 2 A 17.3 94.4
266 1 A -12.5 81.5
267 3 J 12.7 318.1
3 6