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The Iris and the Ghost

Contains: NGC 7023

Technical card

Resolution: 2347x1693

Dates: Aug. 11, 2015

Frames: 40x120"

Integration: 1.3 hours

Avg. Moon age: 26.10 days

Avg. Moon phase: 12.71% job: 741972

RA center: 316.381 degrees

DEC center: 67.901 degrees

Pixel scale: 4.416 arcsec/pixel

Orientation: -176.922 degrees

Field radius: 1.775 degrees


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



Chuck Manges

Sky plot

Sky plot


The Iris and the Ghost, Chuck Manges

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