Sunspot data for 17 November 2023 of period 2023Q4: (PREV DAY - NEXT DAY)
| Sun231117_1218UTC_sketch.jpg | Sun231117_1221UTC.jpg |
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 |  Click here for the sharpened image. |
Today started out grey, but around noon it cleared to about 30% very slow-drifting small patches of stratus. Transparency in between was good, and the scintillation monitor reported very good seeing on average. I made the following observation:
Observation date/time: 17 November 2023 12:18 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 (346mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.500ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.5-1.8" (1.2" at best) =================================================================== Total number of sunspots: 4 | |
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