| Date: | December 2006 (XCM), November 2007 (ST-10) |
| Location: | Elizabeth, CO. ~6500 ft., Mag 5.5 skies |
| Telescope: | 16" f/4.9 Newtonian, Pegasus Optics primary |
| Mount: | Mathis Instruments MI-500 |
| Exposure: | 144 min (2.4 hr) luminance ST-10XME, 90 min RGB ST-2000XCM |
| Corrector: | ST-10 subs at f/9.8 using TeleVue 2x PowerMate. XCM subs at f/4.9 using 3" Keller/Wynne coma corrector. Custom Scientific luminance filter used on each sub. Image scale of large image at f/7.35 |
| Seeing: | ~3.5" FWHM |
| Comments: |
Eighteen ST-10 8 min subs median combined in groups of three in Maxim. 50 iterate PC deconvolution on each median in CCDStack. Deconvolved medians summed in Maxim. DDP/sharpening on sum applied in CCDStack Previous image used as colorizing image: ngc891_2xpm.htm. Color/luminance images registered in Registar. Final LRGB assembly in Corel's PhotoPaint 12 using LAB |