Sunspot data for 5 July 2026 of period 2026Q3: (PREV DAY - NEXT DAY)
| Sun260705_1605UTC_sketch.jpg | Sun260705_1610UTC.jpg |
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 |  Click here for the sharpened image. |
today it was Sun Watching Day in Belgium and the Netherlands, so we were open to the public all day and received some 30 visitors. Weather, however, did not cooperate, so only a few visitors actually saw the Sun through the telescopes. At the end of the day a small gap in the clouds, topped with some cirrus, allowed to observe. Transparency was mediocre, and the scintillation monitor reported mediocre to poor seeing on average. I made the following observation:
Observation date/time: 05 July 2026 16:05 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): 0.6150ms (using 82nm bandwidth green filter) Seeing (SSSMon): 4.5-5.5" (1.0" at best) =================================================================== Total number of sunspots: 12 | |
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