Sunspot data for 9 September 2021 of period 2021Q3: (PREV DAY - NEXT DAY)
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Today we had clear skies with some light patches of cirrus. Transparency was mediocre, seeing extremely good. I made the following observation:
Observation date/time: 09 September 09:00 UTC Telescope: GTT60 (Galileo Type Telescope) Focal length: 1490mm (plano convex singlet) Aperture: 60mm Stop: 30mm Eyepiece: -75mm (plano concave singlet, 24mm aperture) Observation type: projection (351mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.230ms Seeing (SSSMon): 1.5-2.0" =================================================================== Total number of sunspots: 18 | |
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