Sunspot drawing of 1987-5-23

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https://doi.org/10.7891/e-manuscripta-142802



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1987-05-23
08:00
Hs 1304.6:1910
https://doi.org/10.7891/e-manuscripta-142802
Observer : Marco Cortesi
Seeing (SIDC) : 4
Group Not Weighted Weighted Type Latitude Carrington Longit.
47 39 54 D 28 339
48 7 5 B 33 334
49 6 5 B 2 297
3 52 64