Sunspot data for 25 January 2025 of period 2025Q1: (PREV DAY - NEXT DAY)
| Sun250125_1231UTC_sketch.jpg | Sun250125_1234UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today started out grey, but around noon it cleared to about 20% cumuli, topped with some thin stratus. Transparency in between was reasonable, but the scintillation monitor reported mediocre seeing on average. I made the following observation:
Observation date/time: 25 January 2025 12:31 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 (342mm distance, 80mm diameter) Reference: Earth's rotation axis Exposure (transparency): 0.630ms (using 82nm bandwidth green filter) Seeing (SSSMon): 3.0" (1.8" at best) =================================================================== Total number of sunspots: 31 | |
InFINNity Deck... Astrophotography... Astro-Software... Astro Reach-out... Equipment... White papers...
Deep Sky... Solar system (Main)... Solar System (Asteroids)... Solar System (Meteors)... Solar System (Comets)... Man-made objects...
Sun Mercury Venus Moon Mars Jupiter Saturn Uranus Aurora Borealis