Bubble nebula
NGC 7635, M 52 and NGC 7538

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Exposure data

Photographer:

Jürgen Stöger

Optics:

Takahashi FSQ106ED f/5 (main)
Scopos ED66 (guide)

Mount:

Fornax 51

Cameras:

Atik 383L+ (main)
Starlight SXV-M7 (guide)

Exposure:

Hα=180 min, [OIII]=190 min, [SII]=210 min

Conditions:

about 5 mag

Moon:

~38 % illuminated fraction

Location:

Katzelsdorf

Date:

16., 24.+25. September 2011

Remarks:

Image processing assistance by Gerald Wechselberger and Franz Gruber

 

 

NGC 7635 object data
RA: 23h20.7m
Dec: +61° 12'
Size: 15x8'
Distance: 7100 light years

 

M 52 object data
RA: 23h24.2m
Dec: +61° 35'
Size: 12'
Distance: 5000 light years

 

 

 

NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star. 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. It was discovered in 1787 by William Herschel.