Sunspot data for 11 October 2021 of period 2021Q4: (PREV DAY - NEXT DAY)

Sun211011_0948UTC_sketch.jpgSun211011_0951UTC.jpg


This morning we had some 120% cumuli and some stratus of varying thickness. Transparency was poor, seeing was mediocre. I made the following observation: 
Observation date/time:   11 October 09:48 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 (351mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.230ms
Seeing (SSSMon):         3.0"-3.5"

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Total number of sunspots:   3

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