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Thursday, August 26th, 2010
 Very interesting!!!!!   For some unknown reason, my CG5 mount, which had been tracking very accurately up to 2 minutes.......and even 3 minutes at times (unguided), suddenly decided that 2 minutes was too long.....oblong stars.  Hmmmmm?
 
Having no choice, I set up my Starshoot guide camera, got it guiding in PHD......and guess what.   No spikes in the Dec axis, not one.  It guided smoothly for almost 90 minutes.   This time the RA axis was a bit choppy, but it never exceeded 1 pixel in deviation.  I can't explain it, but I'll take it.   Registered in Deep Sky Stacker, every frame registered with almost identical numbers, and I had to throw out ZERO frames!!!   Yeeeee Haaaaaa!
 
I was going to try the Pacman Nebula NGC 281, but the moon was just too bright, and there was that pesky haze.   Rather than get skunked, I settled for another image of M57, the Ring Nebula.   It is small, but boy is it bright...moon or no moon!   My kinda object!  
 
M57:
one hour and ten minutes ( 35 x 120 seconds) @ ISO 800
 
Captured in Nebulosity, aligned and stacked in Deep Sky Stacker, Guided in PHD, processed in Photo Shop CS with Carboni tools and Gradient Exterminator.
 
6" f/5 imaging Newtonian, CG5 GT mounted (Guided), Canon 350D main camera, Starshoot II color guide camera.
 
Yes, I went a bit overboard on the color......so used to not having any.  I will learn to tone it down.
 
*  Notice the central star......cropped images show it clearly!
 


Image Gallery For This Session
M57 embed  8 25 10  35 x 120 sec  ISO 800 sm M57 embed  crop 1  8 25 10 sm
M57 embed  crop 2  8 25 10 m57 screen
m57 screen2 m57 screen 3
   

M57_embed__8_25_10__35_x_120_sec__ISO_800_sm.jpg
Click picture above for larger version
If the picture seems too bright or too dark, try adjusting the brightness below.
Brightness:
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Comments:
On 08/26/10 at 03:58am Barry wrote:
Thanks Neil. Yeh, it came out pretty well. Seeing must have been pretty good, and it was consistent from frame to frame.....could hardly tell one frame from another. I was going to move on to NGC 7331 (the Deer lick) but the sky suddenly got very hazy.....bright halo around the moon. Naturally after I turned off the scope and had things about 75% put away.....the sky cleared again (as clear as it is going to get with the moon that bright.

On 08/26/10 at 03:43am Neil Heacock wrote:
WOW! Barr, this is a really nice shot. You've managed to process out the green cast and your focus is fantastic! Very tight and tiny stars. I see you have the very faint IC 1296 galaxy next to M57 as well. The target may be tiny, but it's a great shot. Congratulations!

-Neil



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