Catching Light

Photography by

Dan Lessmann

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Cheddar Ranch Observatory Clear Sky Clock

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NGC 7023, The Iris Nebula


Click image for larger version.


Date:  8/10/2010

Location:  CRO

Telescope:  Celestron C14 @ f/7

Mount:  AP-1200

Camera:  QSI583WSG

Acquisition:  ImagesPlus Camera Control

Guiding:  PHD Guiding w/ Starlight Xpress Lodestar

LRGB Combine Exposures:

Luminance - 10x600 Seconds, Bin 1x1

Red - 10x300 Seconds, Bin 1x1

Green - 10x300 Seconds, Bin 1x1

Blue - 10x300 Seconds, Bin 1x1

Post Processing:

ImagesPlus:  Dark and flat calibration, align and combine, LRGB Combine, digital development

Photoshop CS4:  Smart sharpen, levels, curves, saturation

NeatImage:  Noise reduction


This is a stunning reflection nebula in Cepheus centered around 7th magnitude star, SAO 19158.  The star is situated just behind a vast dust cloud which reflects it's light primarily in the blue wavelengths giving the nebula its lovely blue color.

Last Updated: 11/12/2014  -  Copyright 2004-2013 by Dan Lessmann.  All rights reserved.  Please click here for my usage policy.