Sunspot data for 22 October 2025 of period 2025Q4: (PREV DAY - NEXT DAY)

Sun251022_0853UTC_sketch.jpgSun251022_0856UTC.jpg





Click here for the sharpened image.
today we had about 30% cumuli, topped with 50% alto cumulus. Transparency in between was excellent, and the scintillation monitor reported good seeing on average. I made the following observation: 
Observation date/time:   22 October 2025 08:53 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 (343mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.430ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         2.0-3.0" (0.9" at best)

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Total number of sunspots:  8

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