Sunspot data for 28 April 2022 of period 2022Q2: (PREV DAY - NEXT DAY)

Sun220428_1301UTC_sketch.jpgSun220428_1312UTC.jpg





Click here for the sharpened image.
This morning we had about 90% cumuli. Transparency in the small clearances was good, but the scintillation monitor reported poor seeing. I made the following observation: 
Observation date/time:   28 April 13:01 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 (346mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.180ms
Seeing (SSSMon):         5.5-7.0"

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Total number of sunspots:   13

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