Sunspot data for 23 April 2023 of period 2023Q2: (PREV DAY - NEXT DAY)
| Sun230423_0747UTC_sketch.jpg | Sun230423_0751UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today we had cirrostratus of varying density and thickness. Transparency at the best moments was good, and the scintillation monitor reported reasonable seeing on average (excellent at best). I made the following observation:
Observation date/time: 23 April 2023 07:47 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): 0.550ms (using 82nm bandwidth green filter) Seeing (SSSMon): 2.0"-3.0" (1.0" at best) =================================================================== Total number of sunspots: 15 | |
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