Sunspot drawing of 1969-12-18

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https://doi.org/10.7891/e-manuscripta-95966



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1969-12-18
14:15
Hs 1304.5:4033
https://doi.org/10.7891/e-manuscripta-95966
Observer : Sergio Cortesi
Seeing (SIDC) : 2
Group Not Weighted Weighted Type Latitude Carrington Longit.
506 29 D -12.1 88.8
507 3 J 6.1 89.7
511 3 J 11.4 79.6
513 24 E 11.8 63.5
516 4 B -12.4 62.9
517 8 D 10.8 7.7
6 71