Sunspot data for 20 August 2021 of period 2021Q3: (PREV DAY - NEXT DAY)
| No sketch made. | Sun210820_1234UTC.jpg |
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Today we had some 50% cumuli, transparency was good, but seeing was mediocre. I made the following observation:
Observation date/time: 20 August 2021 @ 12:30 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: 0 | |
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