Sunspot data for 1 August 2025 of period 2025Q3: (PREV DAY - NEXT DAY)
| Sun250801_1559UTC_sketch.jpg | Sun250801_1607UTC.jpg |
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 |  Click here for the sharpened image. |
Today was mainly grey, but in the early evening it cleared to about 90% cumuli topped with patches of stratus. Transparency in between was good, there was not enough time to measure seeing with the scintillation monitor, but the seeing was good. I made the following observation:
Observation date/time: 01 August 2025 15:59 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 (350mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.480ms (using 82nm bandwidth green filter) Seeing (SSSMon): not measured, but good =================================================================== Total number of sunspots: 19 | |
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