Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7023
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The Iris and the Ghost, 


            Chuck Manges
The Iris and the Ghost
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The Iris and the Ghost

Technical card

Imaging telescopes or lenses: Celestron C1100 Edge HD + Hyperstar

Imaging cameras: QHY CCD QHY10

Mounts: Celestron CGEM DX

Guiding telescopes or lenses: Astro-Tech AT65EDQ 65mm f/6.5 ED quadruplet #2

Focal reducers: Starzona Hyperstar

Software: Adobe Photoshop CS6  ·  APT - Astro Photography Tool

Dates:Aug. 11, 2015

Frames: 40x120"

Integration: 1.3 hours

Avg. Moon age: 26.59 days

Avg. Moon phase: 9.49%

Basic astrometry details

Astrometry.net job: 741972

RA center: 21h 5' 31"

DEC center: +67° 54' 3"

Pixel scale: 4.416 arcsec/pixel

Orientation: -176.922 degrees

Field radius: 1.775 degrees

Resolution: 620x447


NGC7023 & Sh2-136 The Iris & Ghost Nebulas
Both of these reflection nebulas are located in the constellation of Cepheus. The blue nebula, called the Iris Nebula or Caldwell 4, is 1300 light years away and usually identified as the associated open cluster, NGC7023. The Ghost Nebula, Sh2-136 is also known as VdB 1 and is about 1470 light years away.

This is a 4 panel mosaic done with a QHY10 One-Shot Color (OSC) CCD camera and 11" Celestron EdgeHD SCT with Hyperstar. 10 two minute exposures where used per panel. Taken on Aug 11,2015


Sky plot

Sky plot


The Iris and the Ghost, 


            Chuck Manges