Sunspot drawing of 2018-6-9

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https://doi.org/10.7891/e-manuscripta-159995



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2018-06-09
07:45
Hs 1304.6:11235
https://doi.org/10.7891/e-manuscripta-159995
Observer : Sergio Cortesi
Seeing (SIDC) : 4
No group