Sunspot data for 19 July 2023 of period 2023Q3: (PREV DAY - NEXT DAY)
| Sun230719_1133UTC_sketch.jpg | Sun230719_1138UTC.jpg |
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 |  Click here for the sharpened image. |
Today we started out grey, but around noon it cleared to about 80% cumuli, topped with stratocumulus. Transparency in the rare gaps in between was good, and the scintillation monitor reported reasonable seeing on average. I made the following observation:
Observation date/time: 19 July 2023 11:33 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 (351mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.450ms (using 82nm bandwidth green filter) Seeing (SSSMon): 3.5"(2.5"at best) =================================================================== Total number of sunspots: 35 | |
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