Sunspot data for 26 December 2023 of period 2023Q4: (PREV DAY - NEXT DAY)
| Sun231226_0945UTC_sketch.jpg | Sun231226_0952UTC.jpg |
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 |  Click here for the sharpened image. |
Today started out grey, but in the morning a short clearance passed, just large enough to do some observations. Transparency was poor, but the scintillation monitor reported excellent seeing on average. I made the following observation:
Observation date/time: 26 December 2023 09:45 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 (339mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 1.100ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.5" (1.0" at best) =================================================================== Total number of sunspots: 18 | |
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