Sunspot data for 19 June 2025 of period 2025Q2: (PREV DAY - NEXT DAY)
| Sun250619_1544UTC_sketch.jpg | Sun250619_1546UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today started out grey, but at the end of the day it started to clear to about 80% cumuli. Transparency in between was good, but the scintillation monitor reported very poor seeing on average. I made the following observation:
Observation date/time: 19 June 2025 15:44 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 (348mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.480ms (using 82nm bandwidth green filter) Seeing (SSSMon): 6.5-8.0" (4.5" at best) =================================================================== Total number of sunspots: 29 | |
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