Sunspot drawing of 1977-2-17

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https://doi.org/10.7891/e-manuscripta-98870



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1977-02-17
13:00
Hs 1304.5:6222
https://doi.org/10.7891/e-manuscripta-98870
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
14 16 C -42.1 157.0
18 7 B 3.3 141.3
19 6 B 20.5 143.8
21 4 J -19.2 56.6
4 33