Sunspot drawing of 1991-9-21

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https://doi.org/10.7891/e-manuscripta-145892



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1991-09-21
09:15
Hs 1304.6:3275
https://doi.org/10.7891/e-manuscripta-145892
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
500 1 3 J -11 15
503 1 3 J 2 1
504 27 28 D 8 347
515 3 7 C 6 27
516 10 9 C -13 342
517 1 2 A -11 254
518 7 5 B -12 305
519 3 2 A 9 303
520 4 3 B 6 261
9 57 62