Sunspot data for 21 July 2021 of period 2021Q3: (PREV DAY - NEXT DAY)
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Today we had clear skies. Seeing was excellent to start with, good by the time I finished imaging. Transparency was very good. I made the following observation :
Observation date/time: 21 July 2021 @ 09:02 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 (353mm distance, 80mm diameter) Reference: Earth's rotation axis =================================================================== Total number of sunspots: 9 | |
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