Sunspot data for 15 April 2026 of period 2026Q2: (PREV DAY - NEXT DAY)
| Sun260415_1118UTC_sketch.jpg | Sun260415_1126UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
today we had 90 stratocumulus topped with a hazy sky. Transparency was reasonable, but the scintillation monitor reported mediocre to poor seeing on average. I made the following observation:
Observation date/time: 15 April 2026 11:18 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 (345mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.680ms (using 82nm bandwidth green filter) Seeing (SSSMon): 4.0-5.0" (1.0" at best) =================================================================== Total number of sunspots: 12 | |
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