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NGC 7023 The Iris Nebula
Image Information
Quoted from Wikipedia, the free encyclopedia:
The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +7 star, SAO 19158.[1] It shines at magnitude +6.8. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei (Alphirk). It lies 1,300 light-years away and is six light-years across.[2]
References[edit]
- Pasachoff, Jay M. (2000). "Atlas of the Sky". Stars and Planets. New York, New York: Peterson Field Guides. pp. 578 pg. ISBN 0-395-93432-X.
- Caldwell-Moore, Sir Patrick (2003). Firefly Atlas of the Universe. Firefly Books Limited. ISBN 1-55297-819-2.
External links[edit]
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Wikimedia Commons has media related to NGC 7023. |
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NGC 7023 The Iris Nebula
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NGC 7023 Full Crop
This image consists of 19 red, 20 green, and 19 blue RGB images all taken at
-15°C at bin 2x2 for 15 minutes each. A total of 13 luminance images binned 1x1 each 15 minutes long taken at -15°C were used. A total of 17.75 hours LRGB data used. All data was
acquired using MaxImDl/CCD version 5.24 using ACP7.1. Pix Insight version 1.8.02.1098 was used for processing. Dithered guiding was on. |
Equipment and Location Information
Date |
July 25-31, 2014 |
Location |
Dogwood Ridge Observatory |
Optics |
Optical Guidance Systems 12.5" RC @f/9 |
Mount |
Astro Physics AP1200GTO |
Camera |
SBIG STL-11002M/CW8 |
Filters |
Baader LRGB
Ha 7nm,SII 8nm, OIII 8.5nm - 50.8mm Unmounted Filters |
Conditions |
Temperature low to mid 20s with
moderate to good seeing. Transparency good to moderate. |
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