SH2_157 from Laval, France (Guy LE BRAS)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · HD218997 · HD219286 · HD219287 · HD219460 · HD219634 · HD219854 · HD220016 · HD220057 · HD220074 · HD220102 · HD220167 · HD220180 · HD220369 · HD220760 · HD240233 · HD240244 · HD240245 · HD240248 · HD240250 · HD240252 · HD240253 · HD240256 · HD240264 · HD240267 · HD240290 · HD240293 · HD240295 · LBN 533 · LBN 536 · And 23 more.

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SH2_157 from Laval, France

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SH2_157 from Laval, France

One of Cassiopeia's beautiful nebulae is the Bubble Nebula (NGC7635 - 11300 light-years from Earth). But when you widen the field, you come across a small open cluster containing around a hundred stars (M52) and also the Lobster Claw Nebula (SH2_157 - 11050 light-years from Earth). So I tried to fit these three targets into my camera lens and it worked. The bad news is that I was set for 6 hours of shooting and the clouds only left me 2 😢But I think the result is already nice... This is a work in progress as I intend to add exposure time to this RGB version and then add a HOO version.... Technical details :
- Askar FRA500 (F500/D90) scope
- Celestron AVX mount
- Set-up QHY PoleMaster
- Guidance ZWO120MM + PHD2
- Pegasus FocusCube 2 focuser
- Mount and sequencer control: NINA
- ZWO ASI 2600 MC PRO camera (gain 101, Temperature - 10°C, Offset 50)
- L-Pro filter
- Lights 43x180s, 50 DOF
- SIRIL stacking and pre-processing
- PixInsight, BlurXterminator and Noise Xterminator processing
- Luminar NEO post-processing

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Status	Advanced success
Started	...
Astrometry.net job	8502017
PixInsight job	LYKYUHMQ4GCA0P4UVOGTYAAB5XDY05KF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h18m09s.88
RA (top/left)	23h09m37s.71
RA (top/right)	23h12m01s.83
RA (bottom/right)	23h26m04s.95
RA (bottom/left)	23h24m51s.64

Dec (center)	+60°41′27″.3
Dec (top/left)	+61°56′14″.3
Dec (top/right)	+59°16′15″.5
Dec (bottom/right)	+59°24′43″.3
Dec (bottom/left)	+62°05′27″.5

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SH2_157 from Laval, France

SH2_157 from Laval, France

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SH2_157 from Laval, France

SH2_157 from Laval, France

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