Sunspot data for 23 March 2023 of period 2023Q1: (PREV DAY - NEXT DAY)

Sun230323_1442UTC_sketch.jpgSun230323_1446UTC_lum.jpg





Click here for the sharpened image.
This afternoon we had about 30% altostratus and the occasional cirrus. Transparency was good, and the scintillation monitor reported reasonable seeing on average. I made the following observation: 
Observation date/time:   23 March 2023 14:42 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): 0.550ms (using 82nm bandwidth green filter)
Seeing (SSSMon):         2.0"-2.5" (1.5" at best)

===================================================================
Total number of sunspots:   21

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