Sunspot data for 17 July 2024 of period 2024Q3: (PREV DAY - NEXT DAY)
| Sun240717_0821UTC_sketch.jpg | Sun240717_0826UTC.jpg |
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 |  Click here for the sharpened image. |
Today we had about 90% cumuli, topped with some 50% cirrocumulus. Transparency in between was excellent, and the scintillation monitor reported reasonable seeing on average. I made the following observation:
Observation date/time: 17 July 2024 08:21 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 (350mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.400ms (using 82nm bandwidth green filter) Seeing (SSSMon): 3.0-3.5" (2.5" at best) =================================================================== Total number of sunspots: 64 | |
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