Sunspot data for 26 August 2023 of period 2023Q3: (PREV DAY - NEXT DAY)
| Sun230826_1516UTC_sketch.jpg | Sun230826_1518UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today started out wet and grey, but in the afternoon it cleared to about 40% cumuli. Transparency in between was reasonable, and the scintillation monitor reported very good seeing on average. I made the following observation:
Observation date/time: 26 August 2023 15:16 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 (351mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.550ms (using 82nm bandwidth green filter) Seeing (SSSMon): 2.0-2.5" (1.5" at best) =================================================================== Total number of sunspots: 18 | |
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