NGC7635 – The Bubble Nebula

NGC7635 – The Bubble Nebula

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The Bubble Nebula, NGC7635 and Sh2-162, is an emission nebula in Cassiopeia.  It’s near the cluster M52 (I’m working on a wide-field image now that has both the Bubble and M52).  The bubble itself (about 10 light years across) is formed and pushed out by a massive star in the middle of the bubble — its stellar wind irradiating the gas and causing it to glow.

The image is a combination of 30 360s exposures with a Canon T4i (modified to allow Ha light) and Edge 11″ SCT at f/10.  Taken from a dark site in southeastern Utah.

NGC7635 - The Bubble Nebula (Annotated)
NGC7635 – The Bubble Nebula (Annotated)

 

Resolution ........ 0.317 arcsec/pix
Rotation .......... 80.736 deg
Focal ............. 2926.53 mm
Pixel size ........ 4.50 um
Field of view ..... 27' 15.0" x 17' 32.0"
Image center ...... RA: 23 20 32.383  Dec: +61 11 12.85