Sunspot drawing of 1970-12-20

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https://doi.org/10.7891/e-manuscripta-96572



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1970-12-20
08:45
Hs 1304.5:4334
https://doi.org/10.7891/e-manuscripta-96572
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
515 2 A 11.0 1.4
522 7 C 17.6 289.6
524 25 D 12.0 281.8
528 6 B -10.4 306.3
529 4 B -9.2 265.6
530 10 B -10.0 225.3
531 2 A 19.3 234.5
533 22 D 23.4 293.6
534 1 A 13.7 251.2
535 2 A 18.7 214.2
10 81