Sunspot drawing of 1976-4-17

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https://doi.org/10.7891/e-manuscripta-98380



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1976-04-17
08:00
Hs 1304.5:5965
https://doi.org/10.7891/e-manuscripta-98380
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
15 4 H 2.6 208.0
17 4 J 4.5 138.8
18 2 A -9.6 124.6
3 10