Sunspot drawing of 1977-4-17

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https://doi.org/10.7891/e-manuscripta-98711



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1977-04-17
07:30
Hs 1304.5:6268
https://doi.org/10.7891/e-manuscripta-98711
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
32 20 D -20.1 26.0
33 5 B -25.0 60.5
34 7 B -23.1 15.3
3 32