Sunspot drawing of 1987-4-18

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https://doi.org/10.7891/e-manuscripta-142858



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1987-04-18
07:15
Hs 1304.6:1881
https://doi.org/10.7891/e-manuscripta-142858
Observer : Sergio Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
26 11 18 C -31 129
27 5 8 C -31 135
29 2 4 J -7 128
35 1 1 A 27 105
36 2 2 A 30 351
5 21 33