Sunspot data for 17 July 2022 of period 2022Q3: (PREV DAY - NEXT DAY)

Sun220717_0757UTC_sketch.jpgSun220717_0803UTC.jpg





Click here for the sharpened image.
Today we had some 20% cirrus. Transparency in between was excellent, and the scintillation monitor reported reasonable seeing. I made the following observation: 
Observation date/time:   17 July 07:57 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 (349mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.160ms
Seeing (SSSMon):         3.5-4.0"

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Total number of sunspots:   37

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