Sunspot data for 21 May 2024 of period 2024Q2: (PREV DAY - NEXT DAY)

Sun240521_0817UTC_sketch.jpgSun240521_0819UTC.jpg





Click here for the sharpened image.
Today we had clear skies. Transparency was good, but the scintillation monitor reported poor seeing on average. I made the following observation: 
Observation date/time:   21 May 2024 08:17 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): 0.500ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         5.5-6.0" (3.0" at best)

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Total number of sunspots:  35

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