Observation by Kevin Gurney: The lobster claw nebula and friends

Uploaded by

Kevin Gurney

Observer

Kevin Gurney

Observed

2023 Sep 28 - 09:54

Uploaded

2024 Feb 09 - 10:07

Objects

The Lobster Claw Nebula (Sharpless 157)
Sharpless 162
NGC7538

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Constellation

Cassiopeia

Field centre

RA: 23^h16^m
Dec: +60°33'
Position angle: +161°01'

Field size

2°35' × 2°09'

Equipment

Fornax 102 mount
William Optics Star 71
ZWO ASI 1600MM
Baader filters Ha, OIII
Atik EFW
SX Lodestar2
Starkeeper Voyager, Pixinsight, PhD2, XnView

Exposure

16x300s Ha, 16x300s OIII - total 2hrs 40min

Location

Charente, France

Target name

Sh2-157 (Lobster Claw), Bubble nebula (Sh2-162, NGC 7635) and NGC 7538

Title

The lobster claw nebula and friends

About this image

The so-called 'Lobster Claw' nebula is located on the border between Cassiopeia and Cepheus. With a large enough field, it can be imaged to include the Bubble nebula and a couple of other objects. As with all Sharpless objects it is dominated by Ha but there is significant OIII in the 'claws' which I have tried to bring out here. I am currently experimenting with star reduction after extraction with StarXterminator and subsequent recombination. I hope I havent gone too far - but star colours are not well rendered in narrowband, especially bi-colour ones like this.

Files associated with this observation

NBcol_proc5cFINAL_BAA.jpg (1.7 MB)

Like this image

Callum Potter, Gerard Cauchi, Simon Paul Davis, Andy Wilson

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