Sunspot data for 19 August 2025 of period 2025Q3: (PREV DAY - NEXT DAY)

Sun250819_0811UTC_sketch.jpgSun250819_0813UTC.jpg





Click here for the sharpened image.
Today we had clear skies. Transparency was excellent, and the scintillation monitor reported reasonable seeing on average. I made the following observation: 
Observation date/time:   19 August 2025 08:11 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): 0.380ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         2.5-3.0" (1.5" at best)

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Total number of sunspots:  4

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