Sunspot data for 16 April 2021 of period 2021Q2: (PREV DAY - NEXT DAY)

Sun210416_1700UTC_sketch.jpgSun210416_1711UTC.jpg


just arrived back and opened the observatory straight away to make the following observation: 
Observation date/time: 16 April 2021 @ 17:00 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 (340mm distance, 80mm diameter)
Reference:             Earth's rotation axis

===================================================================
Number of groups:      1
Group 1:
    Number of sunspots:    2
-------------------------------------------------------------------
Total number of sunspots:  2

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