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The Iris Nebula, NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus.
NGC 7023 is actually a cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158. Nebula apparent magnitude 6.8
LRGB Image taken 2 September 2006 from Lockwood Valley, California
Lum 150 minutes 1x binned, 5 min sub-exposures
RGB 45:45:45 minutes 2x binned, 5 min sub-exposures
Total Exposure Time = 4.75 hours
| Full EXIF Info | |
| Date/Time | 16-Jan-2007 21:38:03 |
| Make | SBIG ST-10 Dual CCD Camera |
| Model | |
| Flash Used | No |
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| White Balance | |
| Metering Mode | (-1) |
| JPEG Quality | |
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| bsanden | 23-Oct-2007 06:10 | |