The Bubble Nebula, also known as NGC 7635, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia. It lies close to 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 November 1787 by William Herschel.
In the wide angle picture below you can also see an open star cluster named Messier 52 (M52). Both are located in the constellation Cassiopeia, just 0.6 degrees apart.
Object Designations: NGC7635
Also known as: Bubble Nebula
Constellation: Cassiopeia
Object Type: reflection nebula
Distance: 11,000 light-years away
Magnitude: 10
Discovery: William Herschel
Telescope: Apertura CarbonStar 200 Imaging Newtonian 800mm / F4
Camera: ZWO ASI2600 MC Pro – No Filter
Mount: Celestron AVX – With CPWI Software
Guiding: Apertura 32mm Guide Scope with a ZWO ASI120MM Camera and PHD2
SharpCap Imaging Software
Processing Software
AstroSharp Ltd SharpCap
Pleiades Astrophoto PixInsight
Russell Croman Astrophotography BlurXTerminator
Russell Croman Astrophotography NoiseXTerminator
Russell Croman Astrophotography StarXTerminator
Stanley Dimant EZ Processing Suite
This final image is:
100 – 60 second subs at 0 gain, Oplong L-Quad filter
White Bal (B) = 62
White Bal (R )= 99
Brightness = 12
Camera Temperature = -4
Last Plate Solve Data = Plate solve result was RA=23:23:01.3,Dec=+61:12:21 with mount at RA=23:23:01.8,Dec=+61:12:21, FOV 1.558×1.041 degrees, up is 233.52 degrees East of North
