Sunspot data for 28 May 2024 of period 2024Q2: (PREV DAY - NEXT DAY)

Sun240528_0842UTC_sketch.jpgSun240528_0847UTC.jpg





Click here for the sharpened image.
Today we had about 60% cumuli. Transparency in between was excellent, and the scintillation monitor reported reasonable seeing. I made the following observation: 
Observation date/time:   28 May 2024 08:42 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): 0.350ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         2.5-3.5" (2.0" at best)

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Total number of sunspots:  32

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