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NGC7662 Blue Snowball

Started by RolandC, 09/01/2004 09:58AM
Posted 09/01/2004 09:58AM Opening Post
Hi all,

This past Monday night we had superb seeing here in northern Illinois. Even though it was hazy and the full Moon was high in the sky, I thought I would try imaging this tiny planetary through all that murk. I managed a personal best in resolution of 1.5 arc sec FWHM at F11 and 1.3 FWHM at F22. Normally around here it is tough to get better than 2 arc sec.

The wide field image was taken at F11 with my 10" F14.6 Mak-Cass, ST10XE, color filter wheel, on AP 1200 mount. The closeup in the upper right corner was taken with a Barlow at F22. The image is half size in order to fit mostly on the computer screen.

Roland Christen

Attached Image:

RolandC's attachment for post 18452
Posted 09/01/2004 10:00AM #1
Great shot Roland!
Excellent detail within the Nebula itself! a Beauty!

Thank you for sharing!


Ivan Gastaldo 8)
Coconut Creek, FL

Ivan's Observatory
Lat 26N 16' 48" Long 80W 10' 48"
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CCD Imaging and Processing/Deep Sky - Moderator
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Posted 09/01/2004 11:43AM #2

That is a very high resolution image , 1.3 arcsec FWHM ...WOW. I must say it does show, never have seen an image of this with such resolution.

clear skies,

Larry Citro
Posted 09/01/2004 12:08PM #3
That is just incredible, Roland. The detail on that image looks like you were shooting through no atmosphere at all. Were you bothered by gradients?
I saw The Blue Snowball once in a 25" Obsession and you captured the color perfectly.
You've made a good case for when the Hubble goes, we should send up your 10" Mak-Cass setup.
Thanks for sharing.

dan kowall
Posted 09/01/2004 01:09PM #4
Outstanding image, great detail and color. I got a chance to look through one of the few 10" Maks you made (Pheonix, AZ) and I must say the views were unbelievable.
Posted 09/01/2004 01:12PM #5
Roland -

That's a stunning result and a good explanation of FWHM.
Also a great inspiration to what might be done from a less than perfect location - something we all have much of the time.

Alan Friedman

Alan Friedman
Posted 09/01/2004 01:39PM #6
Excellent detail! Congratulations on such great seeing!


Jose Suro
Tierra Verde, Florida