Observation by Dean Ashton: The Crescent

Uploaded by

Dean Ashton

Observer

Dean Ashton

Observed

2023 May 26 - 11:00

Uploaded

2023 Jul 25 - 06:38

Objects

The Crescent Nebula (NGC6888)

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Constellation

Cygnus

Field centre

RA: 20^h12^m
Dec: +38°20'
Position angle: -0°56'

Field size

0°34' × 0°20'

Equipment

Celestron 9.25 EdgeHd with 0.7x Focal Reducer
QHY268C Camera
Optolong L-eNhance Filter & L-eXtreme Filters

Exposure

84x600s, fl 1640mm

Location

St Austell, Cornwall

Target name

Crescent Nebula

Title

The Crescent

About this image

I have re-worked the processing of this 14-hr exposure of NGC6888 to explore the potential of the PI plugin, RC Blur Exterminator, following the excellent 4-part guide by Nik Szymanek, in Astronomy Now. I thought that result for the monochrome luminous component looked so dramatic I left it without adding the RGB data. Image cropped to improve the composition and selective masks used to prevent the brightest areas of the nebulosity 'blowing out'.

Note: As the QHY268C is a one-shot-colour camera, the luminous image is a synthetic L channel created by combining the Ha (red) channels and Oiii (blue & green) channels.

Files associated with this observation

NGC6888_84x600s_L.png (1.8 MB)

Like this image

Simon Paul Davis, Graham Winstanley

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