Sunspot data for 11 January 2025 of period 2025Q1: (PREV DAY - NEXT DAY)
| Sun250111_1028UTC_sketch.jpg | Sun250111_1032UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today we had cumuli in patches with large clearances in between. Transparency in between was reasonable, but the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 11 January 2025 10:28 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 (342mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.630ms (using 82nm bandwidth green filter) Seeing (SSSMon): 3.5-4.0" (1.7" at best) =================================================================== Total number of sunspots: 20 | |
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