Sunspot drawing of 1974-12-21

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https://doi.org/10.7891/e-manuscripta-97754



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1974-12-21
08:30
Hs 1304.5:5564
https://doi.org/10.7891/e-manuscripta-97754
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
197 5 H 12.8 103.4
201 6 J 5.7 35.4
202 1 A -16.2 143.5
203 4 B 6.3 74.6
204 1 A 17.8 95.4
205 1 A 9.0 44.5
6 18