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The Bubble Nebula in Narrowband


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About this observation
Kevin Gurney
Time of observation
17/06/2019 - 23:00
NGC 7635
Observing location
Embourie, Charente, France
Celestron 8SE scope
ZWO ASI1600MM-Pro Cool camera
Baader Planetarium Ha 1.25" 7nm: 10x300" -20C bin 1x1 Baader Planetarium OIII 1.25" 8.5nm: 10x300" -20C bin 1x1 Baader Planetarium S2 1.25" 8nm: 10x300" -20C bin 1x1
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Kevin captured this narrowband image of NGC 7635 (bubble nebula) in France under a reportedly "beautiful clear sky", but a full moon, so narrowband was the only option.
The nominal palette is Ha = red, OIII = blue, SII = Green (although there isn't much at SII to be honest). The eventual colour mix with Ha more 'orangy', occurs to get a good colour balance for stars in Pixinsight. The blue then mixes with this to give a purple(ish) central region where any OII occurs.
Details are:
Bubble Nebula: NGC 7635

17th June 2019

Embourie, Charente, France

Imaging telescope or lens:Celestron 8SE
Imaging camera:ZWO ASI1600MM-Pro Cool
Mount:SkyWatcher AZ-EQ6GT
Focal reducer:ASA 2" Reducer Corrector 0,77
Software:XnView,  Hyperion Prism v10,  PixInsight 1.8 Ripley
Filters:Baader Planetarium S2 1.25" 8nm,  Baader Planetarium Ha 1.25" 7nm,  Baader Planetarium OIII 1.25" 8.5nm
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