Sunspot data for 20 September 2022 of period 2022Q3: (PREV DAY - NEXT DAY)
| Sun220920_1328UTC_sketch.jpg | Sun220920_1330UTC.jpg |
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 |  Click here for the sharpened image. |
Today started fully overcast but in the end it cleared to about 30% cumuli. Transparency in between was excellent, but the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 20 September 13:28 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): 0.160ms Seeing (SSSMon): 4.0-4.5" (2.0" at best) =================================================================== Total number of sunspots: 12 | |
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