Sunspot drawing of 2017-7-29

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https://doi.org/10.7891/e-manuscripta-159385



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2017-07-29
08:00
Hs 1304.6:10998
https://doi.org/10.7891/e-manuscripta-159385
Observer : Sergio Cortesi
Seeing (SIDC) : 3
No group