Sunspot data for 23 June 2023 of period 2023Q2: (PREV DAY - NEXT DAY)
| Sun230623_0830UTC_sketch.jpg | Sun230623_0833UTC.jpg |
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 |  Click here for the sharpened image. |
Today started out fully overcast, but it soon cleared to about 10% cumuli. Transparency in between was excellent, but the scintillation monitor reported poor seeing on average. I made the following observation:
Observation date/time: 23 June 2023 08:30 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 (352mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.450ms (using 82nm bandwidth green filter) Seeing (SSSMon): 5.0"-5.5" (3.0" at best) =================================================================== Total number of sunspots: 38 | |
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