Sunspot data for 9 December 2022 of period 2022Q4: (PREV DAY - NEXT DAY)
| Sun221209_1232UTC_sketch.jpg | Sun221209_1235UTC.jpg |
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 |  Click here for the sharpened image. |
Today we had dense fog, which only very slowly thinned. Finally it was thin enough to do some observations. Transparency was poor, and the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 09 December 12:32 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 (340mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.480ms Seeing (SSSMon): 2.5-3.0" (1.5" at best) =================================================================== Total number of sunspots: 22 | |
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