Post by DaveMitsky on Oct 21, 2014 12:01:47 GMT -6
I did a bit of solar observing not too long ago during a break in the clouds. The large sunspot group (active region) AR(1)2192 was easily visible without magnification using black polymer solar eclipse shades. In other words, it's a naked-eye sunspot.
As seen in the light of H-alpha through my 40mm f/10 Coronado PST were several filaments (one of them quite lengthy), a few small prominences, and AR2192 and some smaller sunspots.
Browse spaceweather.com/ for additional information on AR2192.
The Spaceweather.com image of the photosphere for today is posted at spaceweather.com/images2014/21oct14/hmi1898.gif?PHPSESSID=2mh0u1qh4uc6gi4vv5k6i1sar7
Dave Mitsky
As seen in the light of H-alpha through my 40mm f/10 Coronado PST were several filaments (one of them quite lengthy), a few small prominences, and AR2192 and some smaller sunspots.
Browse spaceweather.com/ for additional information on AR2192.
The Spaceweather.com image of the photosphere for today is posted at spaceweather.com/images2014/21oct14/hmi1898.gif?PHPSESSID=2mh0u1qh4uc6gi4vv5k6i1sar7
Dave Mitsky