Observation Notes
Bubble Nebula
NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia.
Bubble Nebula
NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region emission nebula in the constellation Cassiopeia.
*Bubble Nebula from Everett Quebral's AstroBin gallery*
*View on AstroBin: [https://app.astrobin.com/i/332183](https://app.astrobin.com/i/332183)*
About Bubble Nebula
NGC 7635, also known as the Bubble Nebula, 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, SAO 20575 (BD+60°2522). 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. The star BD+60°2522 is thought to have a mass of about 44 M☉.
Learn more on Wikipedia: https://en.wikipedia.org/wiki/Bubble_Nebula
Imaging
Equipment Versatility
Beginner: DSLR/mirrorless + short lens, simple tracking or tripod.
Intermediate: Small refractor on EQ mount, dedicated astro camera.
Advanced: Larger aperture, precise guiding, mono camera + filters.