Sunspot data for 27 October 2025 of period 2025Q4: (PREV DAY - NEXT DAY)
| Sun251027_1043UTC_sketch.jpg | Sun251027_1047UTC.jpg |
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 |  Click here for the sharpened image. |
today started out with 80% fast moving cumuli with showers and force 5 winds, but a large clearance allowed for observations. Transparency in it was excellent, and the scintillation monitor reported good seeing on average. I made the following observation:
Observation date/time: 27 October 2025 10:43 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 (345mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.410ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.5-1.7" (1.0" at best) =================================================================== Total number of sunspots: 13 | |
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