Sunspot data for 19 July 2024 of period 2024Q3: (PREV DAY - NEXT DAY)
| Sun240719_1711UTC_sketch.jpg | Sun240719_1714UTC.jpg |
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 |  Click here for the sharpened image. |
Today we had a patch of altocumuli covering the north-west of the Netherlands until early evening when it finally cleared. Transparency was poor, and the scintillation monitor reported poor seeing on average. I made the following observation:
Observation date/time: 19 July 2024 17:11 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 (350mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.800ms (using 82nm bandwidth green filter) Seeing (SSSMon): 6.5-7.0" (3.5" at best) =================================================================== Total number of sunspots: 38 | |
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