Sunspot data for 28 February 2022 of period 2022Q1: (PREV DAY - NEXT DAY)
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Today again we had completely clear skies, although stratus was already visible on the western horizon and is expected to cover the Netherlands this afternoon. Transparency was good, seeing was reported reasonable by the scintillation monitor, although low-frequency undulation was present. I made the following observation:
Observation date/time: 28 February 09:21 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 (340mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.180ms Seeing (SSSMon): 2.0 - 2.5" =================================================================== Total number of sunspots: 4 | |
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