Sunspot data for 28 August 2021 of period 2021Q3: (PREV DAY - NEXT DAY)
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Today we had about 80% cumuli, which were moving quite fast. Transparency was reasonable, seeing mediocre to good. I made the following observation:
Observation date/time: 28 August 2021 @ 08:14 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 =================================================================== Total number of sunspots: 15 | |
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