Sunspot data for 30 April 2023 of period 2023Q2: (PREV DAY - NEXT DAY)

Sun230430_0916UTC_sketch.jpgSun230430_0920UTC.jpg





Click here for the sharpened image.
Today we had clear skies with some contrails and the odd cumulus. Transparency was excellent, but the scintillation monitor reported very poor seeing on average. I made the following observation: 
Observation date/time:   30 April 2023 09:16 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 (346mm distance, 80mm diameter)
Reference:               Earth's rotation axis
Exposure (transparency): 0.450ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         5.5"-6.0" (4.0" at best)

===================================================================
Total number of sunspots:   24

PREV DAY - NEXT DAY

Home Geodesy Navigation Astronomy Literature
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