NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia, at 7000 to 11000 light years from Earth.  The "bubble" is created by the stellar wind from a massive hot, young central star, SAO 20575. 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.
Image Details
📷 Exposure: (Ha, OIII, SII)
Hα, bin 1, 78x 600s
OIII, bin 1, 76x 600s
SII, bin 1, 70x 600s

🔭 Equipment
Refractor TS86SDQ, 86 mm aperture, 450 mm focal length
Camera QSI 600 Series wsg(-8)
Orion StarShoot AutoGuider
Mount Avalon M-Zero
Primalucelab Sesto Senso focuser
Primalucelab Eagle2 computer

💻 Software: 
(Windows 10) Sequence Generator Pro, PHD2, SkySafari, ASCOM drivers
(Mac OSX) PixInsight

Lausanne, Switzerland
Bright suburban light pollution, Class 6 of darkness in Bortle scale.
Back to Top