Sunspot drawing of 1977-2-12

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https://doi.org/10.7891/e-manuscripta-98894



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1977-02-12
15:00
Hs 1304.5:6217
https://doi.org/10.7891/e-manuscripta-98894
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
14 33 E -40.9 162.7
17 6 B 14.4 197.2
18 15 C 2.4 139.8
3 54