Sunspot data for 14 September 2025 of period 2025Q3: (PREV DAY - NEXT DAY)
| Sun250914_0800UTC_sketch.jpg | Sun250914_0803UTC.jpg |
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 |  Click here for the sharpened image. |
today we had approximately 70% cumuli with showers. Transparency in between was excellent, and the scintillation monitor reported good seeing on average. I made the following observation:
Observation date/time: 12 September 2025 07:58 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 (348mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.430ms (using 82nm bandwidth green filter) Seeing (SSSMon): 2.0-2.5" (0.8" at best) =================================================================== Total number of sunspots: 7 | |
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