Sunspot data for 23 April 2026 of period 2026Q2: (PREV DAY - NEXT DAY)
| Sun260423_0848UTC_sketch.jpg | Sun260423_0855UTC.jpg |
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 |  Click here for the sharpened image. |
today started out grey, but it soon cleared completely, albeit with some contrails. Transparency was excellent, but the scintillation monitor reported poor seeing on average and the view was distorted by large amplitude undulations. I made the following observation:
Observation date/time: 23 April 2026 08:48 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 (345mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.380ms (using 82nm bandwidth green filter) Seeing (SSSMon): 5.0-6.0" (3.5" at best) =================================================================== Total number of sunspots: 17 | |
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