Sunspot drawing of 1973-2-17

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https://doi.org/10.7891/e-manuscripta-97390



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1973-02-17
08:30
Hs 1304.5:4985
https://doi.org/10.7891/e-manuscripta-97390
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
38 2 A 11.3 15.7
46 13 D -15.7 306.6
51 10 A -9.6 286.8
53 3 A 10.0 302.4
4 28