Sunspot data for 29 September 2023 of period 2023Q3: (PREV DAY - NEXT DAY)
| Sun230929_1353UTC_sketch.jpg | Sun230929_1357UTC.jpg |
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 |  Click here for the sharpened image. |
Today started out grey, but in the afternoon it cleared to very thin stratus and the odd cumulus. Transparency was mediocre, and the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 29 September 2023 13:53 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 (349mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.650ms (using 82nm bandwidth green filter) Seeing (SSSMon): 3.5-4.0" (2.0" at best) =================================================================== Total number of sunspots: 19 | |
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