Sunspot drawing of 1974-8-17

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https://doi.org/10.7891/e-manuscripta-97693



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1974-08-17
07:00
Hs 1304.5:5456
https://doi.org/10.7891/e-manuscripta-97693
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
131 6 J -3.8 341.5
133 20 B -17.4 336.7
134 22 D 8.6 324.7
135 3 J -14.2 257.6
4 51