Sunspot data for 21 May 2022 of period 2022Q2: (PREV DAY - NEXT DAY)

Sun220521_0812UTC_sketch.jpgSun220521_0817UTC.jpg





Click here for the sharpened image.
Today the sky was covered with a thin cirrus. Transparency was good, and the scintillation monitor reported reasonable seeing. I made the following observation: 
Observation date/time:   21 May 08:12 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): 0.180ms
Seeing (SSSMon):         3.5-4.5"

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Total number of sunspots:   27

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