Sunspot drawing of 1971-12-13

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https://doi.org/10.7891/e-manuscripta-96716



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1971-12-13
09:00
Hs 1304.5:4650
https://doi.org/10.7891/e-manuscripta-96716
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
339 8 B -13.7 299.5
345 3 J -2.9 250.4
348 27 D 8.3 242.5
353 13 D 17.6 195.3
354 6 J -14.0 188.5
357 1 A 8.5 219.0
358 1 A -12.6 257.5
359 4 A -9.5 222.1
360 5 C 11.6 180.2
9 68