Sunspot data for 31 May 2026 of period 2026Q2: (PREV DAY - NEXT DAY)
| Sun260531_0728UTC_sketch.jpg | Sun260531_0730UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
today we had some 80% cumuli, but with some large gaps in between. Transparency in them was good, and the scintillation monitor reported reasonable seeing on average. I made the following observation:
Observation date/time: 31 May 2026 07:28 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): 0.530ms (using 82nm bandwidth green filter) Seeing (SSSMon): 2.8-3.7" (1.6" at best) =================================================================== Total number of sunspots: 19 | |
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