Sunspot drawing of 1977-6-20

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https://doi.org/10.7891/e-manuscripta-98719



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1977-06-20
07:30
Hs 1304.5:6316
https://doi.org/10.7891/e-manuscripta-98719
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
55 2 B 26.8 220.6
56 2 B -9.1 228.8
58 3 A 19.1 211.0
59 16 C -22.1 204.1
4 23