Sunspot data for 12 October 2021 of period 2021Q4: (PREV DAY - NEXT DAY)

Sun211012_1205UTC_sketch.jpgSun211012_1209UTC.jpg


This morning it was fullly overcast with rain, but around noon the weather improved leaving us with some 50% cumuli. Transparency was good, seeing was mediocre. I made the following observation: 
Observation date/time:   12 October 12:05 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): 0.180ms
Seeing (SSSMon):         3.0"-4.0"

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Total number of sunspots:   3

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