Sunspot data for 23 February 2025 of period 2025Q1: (PREV DAY - NEXT DAY)
| Sun250223_1050UTC_sketch.jpg | Sun250223_1055UTC.jpg |
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 |  Click here for the sharpened image. |
Today started out grey, but by the end of the morning it cleared to about 10% cumuli topped with 80% thin stratus. Transparency was reasonable, and the scintillation monitor reported reasonable seeing on average. I made the following observation:
Observation date/time: 23 February 2025 10:50 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): 0.630ms (using 82nm bandwidth green filter) Seeing (SSSMon): 2.0-2.5" (1.0" at best) =================================================================== Total number of sunspots: 47 | |
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