Sun in CaK 
With Williams Optics Zenithstar 81
+ Lunt CaK filter 
Uploaded 9/1/24

Daily Report
For Monday, September 1, 2024
 

            
 On
            Sunday September 1st, as the Sun rose in the east, fabulous post
            flare loops (Arcadia Loops) was seen on the limb of the Sun.
            Fortunately, this really rare event was easily visible in the
            Calcium K filter I was using. It is very uncommon to image proms
            and loops like this in Calcium light because they are so much
            fainter than Halpha, so this shot will be unique. A full disk
            and a 3x barlow shot is included for complete coverage. This
            could be the only shot you get at this wavelength.

            
Technical
            Data:

            Subject: Arcade Loops on Sun

            Date: 9/1/24 8am MST

            Scope: Williams Optics Zenithstar 81 + Lunt B600 CaK filter

            Magnifications: Prime focus and 3x Klee Barlow

            Camera: ASI183 mm

            Integration: 100ms

            Location: Payson, Az

Images below are 800 wide and non clickable
 

            
 Calcium
            K:

            

              

                

                  
 Click to see full size:


Prime focus with the Zenithstar 81 and Lunt B600
Calcium K filter.
                
                

                  
Click to see full size:
 

With 3x Klee barlow and Zenithstar 81, B600 shows 
the loops more clearly.
                
              
            


Instruments:  Zenithstar 81 semi apo
Platform:  Astrophysics 1200
Camera:  ASI183 cmos
Location:  Payson, Arizona
Elevation:  5150 ft.
Sky:  Seeing 1/5, Transparency 7/10
Outside Temperature: 75F
Processing: Autostakkert, Photoshop CS2

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