Sunspot data for 25 December 2023 of period 2023Q4: (PREV DAY - NEXT DAY)
| Sun231225_1145UTC_sketch.jpg | Sun231225_1151UTC.jpg |
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 |  Click here for the sharpened image. |
Today started out grey, but around noon it thinned enough to do some observations. Transparency was mediocre, but the scintillation monitor reported good seeing on average. I made the following observation:
Observation date/time: 25 December 2023 11:45 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): 0.850ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.5-2.0" (1.0" at best) =================================================================== Total number of sunspots: 19 | |
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