Sunspot data for 18 April 2021 of period 2021Q2: (PREV DAY - NEXT DAY)
| Sun210418_0925UTC_sketch.jpg | Sun210418_0944UTC.jpg |
|---|---|
 |  |
today we had a lovely morning, though with varying seeing. I made the following observation:
Observation date/time: 18 April 2021 @ 09:25 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: 3
-------------------------------------------------------------------
Total number of sunspots: 3
| |
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