Sunspot data for 16 May 2023 of period 2023Q2: (PREV DAY - NEXT DAY)
| Sun230516_1655UTC_sketch.jpg | Sun230516_1657UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
(this sketch has an erroneous clock-wise orientation)
Today we had cumuli of varying size and density. Transparency in between was very poor, and the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 16 May 2023 16:55 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): 0.800ms (using 82nm bandwidth green filter) Seeing (SSSMon): 3.5"-4.5" (2.5" at best) =================================================================== Total number of sunspots: 16 | |
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