Sunspot data for 13 February 2024 of period 2024Q1: (PREV DAY - NEXT DAY)

Sun240213_1001UTC_sketch.jpgSun240213_1005UTC.jpg





Click here for the sharpened image.
Today we had varying cumuli, topped with fields of stratus. Transparency in between was reasonable, and the scintillation monitor reported good to mediocre seeing. I made the following observation: 
Observation date/time:   13 February 2024 10:01 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 (341mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.650ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         2.0-4.0" (1.0" at best)

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Total number of sunspots:  49

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