(Click on image for full size version)
| Description: | This group of galaxies consists of NGC7331, the
large one, and on the left from top to bottom, NGC7335, NGC7336, NGC7340
(left) and NGC7337(right). Reportedly,
Tomm Lorenzin (author of
"1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing") gave the
name to the NGC 7331 group in honor of Deer Lick Gap in the mountains of
North Carolina where he observed and once had an especially fine view of the
group of galaxies. North is up. |
| Exposure Data: | 10/5,7/2004. LRGB:100x3m, 12x3m,
12x3m, 12x3m. RGB 2x2. -20°C, 0.58 arc-sec./pixel. |
Processing: |
Automatic acquisition via CCDAutoPilot and CCDSoft,
reduced and aligned, in Mira, RGB combine in Maxim, LLRGB combine, curves, levels and other
processing in Photoshop. |
| Optical System: | 14.5”
Ritchey-Chretien RCOS Truss @ F/6.4, ST-10XME NABG CCD camera, FLI CFW-2
filter wheel, Paramount ME. AstroDon filters with luminance filter. Unguided and
dithered 4 arc-sec. |
| Comments: | FWHM's were 3 arc-sec., deconvolved to 1.8
arc-sec. Here is a link to last year's effort. |