Sunspot data for 25 May 2023 of period 2023Q2: (PREV DAY - NEXT DAY)
| Sun230525_1556UTC_sketch.jpg | Sun230525_1602UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
(this sketch has an erroneous clock-wise orientation)
Today we had about 5% cumuli. Transparency was reasonable, but the scintillation monitor reported very poor seeing on average. I made the following observation:
Observation date/time: 25 May 2023 15:56 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 (349mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.550ms (using 82nm bandwidth green filter) Seeing (SSSMon): 6.5"-7.5" (4.0" at best) =================================================================== Total number of sunspots: 30 | |
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