Prawn Nebula - HaRGB

Greetings all,
I was able to get a fairly southern object - IC 4628. At my 32 degrees latitude, this object tops out at about 16 degrees above the horizon. I was at a good viewing location with good conditions. This is an Ha, RGB image with Ha as the luminance. A full size image and exposure / processing details are at:

http://jthommes.com/Astro/IC4628.htm

The scope was my Megrez II at f/4.3
Camera was an Artemis285

Also, this is one of the first images I have done with my new G11/Gemini mount. I have been really pleased with it over my ASGT. One feature I really like with the G11 is the ability to image past the meridian for up to 2 hours (30 degrees). Of course the increased accuracy and more sophisticated sky model are real pluses too.

Wow, I wouldn't have guessed that you could get that from CA. Excellent shot!

Tom

Jim,

Congrats on your G11! With your processing skills and the ability to take deeper exposures now, I expect to see some fantastic images from you soon!

Take care,
Eric

Jim,
That's an excellent result for an object so low on the horizon. One would expect the blue channel to show extinction problems, but your color looks good.
The ability to image through the meridian is one of the first things I look for in a mount. You're really going to enjoy that feature.

dan

Thanks all for your comments...

Dan, I neglected to mention in my processing details that I did an extinction correction on this image. It is approximate of course based on atmospheric averages rather than any "calibration" I did for my area. At midrange curves I scaled RGB 121:128:135 respectively. This was after G2V calibrationfrom some data taken awhile back on my image train. I know its crude, but it helps.

Beautiful shot Jim! 8)

Looking good Jim!