NGC 7635: the Bubble Nebula

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The Bubble Nebula 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 windfrom a massive hot, 8.7 magnitude young central star, the 15 ± 5 M SAO 20575 (BD+60 2522). The nebula is near a giantmolecular 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. The star SAO 20575 or BD+602522 is thought to have a mass of 10-40Solar masses.

Imaging telescopes or lenses: Bresser Messier AR-152S 152/760
Imaging cameras: SBIG ST- 8300M
Mounts: Skywatcher AZ EQ6 GT
Guiding telescopes or lenses: Bresser Messier AR-152S 152/760
Guiding cameras: ALccd5-IIm
Software: Adobe Photoshop CS5
Filters: Baader Planetariun Ha 35nm, Baader Planetariun OIII 8.5nm
Accessories: TS 9mm OAG, Teleskop-Service TS FLAT 2,5

Autor: Petko Marinov

AstroPhotography of the day by SPONLI

22 February 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.