Sunspot data for 4 April 2026 of period 2026Q2: (PREV DAY - NEXT DAY)
| Sun260404_0914UTC_sketch.jpg | Sun260404_0916UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
today started out grey, but it soon cleared completely. Transparency was excellent, but the scintillation monitor reported poor seeing on average. I made the following observation:
Observation date/time: 04 April 2026 09:14 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): 5.0-5.5" (3.0" at best) =================================================================== Total number of sunspots: 25 | |
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