Sunspot data for 25 October 2025 of period 2025Q4: (PREV DAY - NEXT DAY)
| Sun251025_1443UTC_sketch.jpg | Sun251025_1459UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
today started out wet, windy and grey, but by the end of the day we had about 70% cumuli with showers. Transparency in between varied and was poor during imaging (good during sketching), and the scintillation monitor reported good seeing on average. I made the following observation:
Observation date/time: 25 October 2025 14:43 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 (343mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.930ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.5-2.0" (0.7" at best) =================================================================== Total number of sunspots: 9 | |
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