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The Bubble Nebula & Lobster Claw Nebula | by Martin_Heigan
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The Bubble Nebula & Lobster Claw Nebula

Best viewed LARGE.

Click on the image to Zoom In & Out on the Bubble Nebula. The "Bubble" is tagged in the image.

 

A widefield LRGB and SHO (SII+Ha+OIII) Narrowband image of the Bubble and Lobster Claw Nebula. The Bubble Nebula is also know as NGC 7635, Sharpless 162, or Caldwell 11 (a H II region emission nebula) in the constellation Cassiopeia. It lies close to the open star cluster Messier 52.

 

Also take a look at a closer view of the Bubble Nebula.

 

The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star, SAO 20575 (BD+60°2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.

 

The Lobster Claw Nebula (Sharpless 157), is a bright emission nebula, and is clearly visible at the bottom right.

 

Gear:

William Optics Star 71mm f/4.9 Imaging APO Refractor Telescope.

William Optics 50mm Finder Scope.

Garmin SkySync GPS Accessory.

Orion Mini 50mm Guide Scope.

Orion StarShoot Autoguider.

Celestron AVX Mount.

QHYCCD PoleMaster.

Celestron StarSense.

Aurora Flatfield Panel.

Optolong 36mm L-Pro, LRGB & SHO filters.

QHYCFW2-M-US Filterwheel (7 position x 36mm).

QHY163M Cooled CMOS Monochrome Astronomy Camera.

 

Tech:

Guiding in Open PHD 2.6.3.

Image acquisition in Sequence Generator Pro.

 

Image Acquisition:

Sequence Generator Pro with the Framing Wizard.

 

Plate Solving:

Astrometry.net ANSVR Solver via SGP.

 

Photographed in the following wavelengths of light:

Imaged over several sessions in LRGB & SHO.

OIII line 500.7nm (6.5nm bandwidth)

H-alpha line 656nm (7nm bandwidth)

SII line 672nm (6.5nm bandwidth)

Enhanced emission lines:

OIII (496, 500nm)

H-beta (486nm)

NII (654, 658nm)

H-alpha (656nm)

SII (672nm)

Infrared cut-off at 700-1100nm

 

Processing:

Pre-Processing and Linear workflow in PixInsight,

and finished in Photoshop.

 

Astrometry Info:

View an Annotated Sky Chart for this image.

Center RA, Dec:349.675, 60.791

Center RA, hms:23h 18m 42.072s

Center Dec, dms:+60° 47' 28.518"

Size: 2.07 x 2.36 deg

Radius: 1.571 deg

Pixel scale: 4.14 arcsec/pixel

Orientation: Up is 358 degrees E of N

View yhis image in the World Wide Telescope.

 

Flickr Explore:

2017-09-09

 

Martin

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Taken on August 21, 2017