View Single Post
  #7  
Old 14-04-2019, 04:06 PM
Merlin66's Avatar
Merlin66 (Ken)
Registered User

Merlin66 is offline
 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
Sounds like your imaging the light bridge which is currently crossing the umbra. Visible in white light, Ha and CaK.
This is usually a precursor to the spot splitting.....let's see what happens.

Mark,
Thanks. The DIY CaK filter seems to be working well. Really needs a f15 - f20 beam to give a good bandwidth....
Attached Thumbnails
Click for full-size image (093338a.jpg)
24.9 KB13 views
Click for full-size image (101619b.jpg)
28.1 KB13 views
Reply With Quote