Sunspot data for 20 December 2024 of period 2024Q4: (PREV DAY - NEXT DAY)
| Sun241220_1029UTC_sketch.jpg | Sun241220_1030UTC.jpg |
|---|---|
 |  Click here for the sharpened image. |
Today we had 10% cumuli, topped with a hazy sky with contrails and altocumuli. Transparency in between was poor, but the scintillation monitor reported excellent seeing on average. I made the following observation:
Observation date/time: 20 December 2024 10:29 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): 1.980ms (using 82nm bandwidth green filter) Seeing (SSSMon): 1.2-1.8" (0.7" 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