Sunspot data for 28 July 2023 of period 2023Q3: (PREV DAY - NEXT DAY)
| Sun230728_1821UTC_sketch.jpg | Sun230728_1854UTC.jpg |
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 |  Click here for the sharpened image. |
Today it was mainly overcast with a combination of cumuli and stratus. Shortly for sunset there was a clear moment in which I could make the observation. Imaging was done through stratus. Transparency was very poor, but the scintillation monitor reported very good to excellent seeing on average. I made the following observation:
Observation date/time: 28 July 2023 18:21 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 (351mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 2.850ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.0-2.5"(0.5"at best) =================================================================== Total number of sunspots: 24 | |
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