Sunspot data for 27 April 2026 of period 2026Q2: (PREV DAY - NEXT DAY)
| Sun260427_0857UTC_sketch.jpg | Sun260427_0900UTC.jpg |
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 |  Click here for the sharpened image. |
today we had 100% altostratus of varying thickness. Transparency at best was good, but the scintillation monitor reported poor seeing on average, even though visually it was good. I made the following observation:
Observation date/time: 27 April 2026 08:57 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): 0.480ms (using 82nm bandwidth green filter) Seeing (SSSMon): 6.0-6.5" (2.5" at best) =================================================================== Total number of sunspots: 37 | |
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