Sunspot data for 28 June 2026 of period 2026Q2: (PREV DAY - NEXT DAY)

Sun260628_0755UTC_sketch.jpgSun260628_0757UTC.jpg





Click here for the sharpened image.
today we had 10% cumuli. Transparency in between was excellent, and the scintillation monitor reported good seeing on average. I made the following observation: 
Observation date/time:   28 June 2026 07:55 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 (345mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.380ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         2.3-2.7" (1.2" at best)

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Total number of sunspots:  60

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