Sunspot data for 20 July 2024 of period 2024Q3: (PREV DAY - NEXT DAY)

Sun240720_0833UTC_sketch.jpgSun240720_0836UTC.jpg





Click here for the sharpened image.
Today we had clear skies. Transparency was excellent, but the scintillation monitor reported mediocre seeing on average. I made the following observation: 
Observation date/time:   20 July 2024 08:33 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): 0.400ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         3.5-4.0" (2.0" at best)

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Total number of sunspots:  54

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