Sunspot drawing of 1971-9-18

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https://doi.org/10.7891/e-manuscripta-96859



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1971-09-18
07:15
Hs 1304.5:4575
https://doi.org/10.7891/e-manuscripta-96859
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
267 3 A 11.6 318.2
268 7 B -16.2 1.9
269 4 B 12.9 291.9
270 6 J 4.2 279.7
271 23 D -11.7 278.8
273 2 A -2.3 242.3
274 3 A -6.1 229.1
7 48