Sunspot data for 18 March 2023 of period 2023Q1: (PREV DAY - NEXT DAY)
| Sun230318_0849UTC_sketch.jpg | Sun230318_0855UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today we had about 50% cumuli, topped with some 30% stratus. Transparency was good, but the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 18 March 09:49 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 (342mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.550ms (using 82nm bandwidth green filter) Seeing (SSSMon): 2.0"-2.5" (1.5" at best) =================================================================== Total number of sunspots: 3 | |
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