deep-sky
nebula (emission)
NGC 7635 – Bubble Nebula
NGC7635 also known as the Bubble Nebula (other designations: SH-162, Caldwell 11) is an emission nebula in the constellation Cassiopeia, it was discovered in 1787 by William Herschel.
The bubble is created by the stellar wind from a massive hot young central star, it lies at a distance of 11.000 light years and measures 12 light years across.
Besides this nebula, also several other objects are visible in the image.
Open star cluster Messier 52 can be seen left of center.
The small and bright emission nebula above and to the right of the Bubble Nebula is NGC7538. The small filaments of nebulousity at bottom right belong to the object Sharpless 2-157
Other / older versions :
Image information:
Object info
Name: NGC 7635 – The Bubble Nebula
Type: Nebula (emission)
Constellation: Cassiopeia
Distance: 11000 ly
Date & location
Date: September 17, 2012
Location: Landgraaf, The Netherlands
Equipment & optics
Total integration: 4h
Camera: SBIG ST-8300M
Optics: TMB/LOMO 80/480
Mount: Losmandy G-11 Gemini
Image comments
All RGB exposures were taken through IDAS LPS-2 filter which was in front of the filter wheel.
Need to optimize backfocus distance
