"Bubble Nebula" redirects here. For the Bubble Nebula in Barnard's Galaxy, see Bubble Nebula (NGC 6822).
NGC 7635, also known as the Bubble Nebula, Sharpless 162, or Caldwell 11, is an H II region[1]emission nebula in the constellation Cassiopeia. It lies close to the direction of the open clusterMessier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7[1]magnitude young central star, SAO 20575 (BD+60°2522).[7] 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.[7] It was discovered in 1787 by William Herschel.[5] The star BD+60°2522 is thought to have a mass of about 44 M☉.
NGC 7635 and its environs imaged through an 8-inch amateur telescope
With an 8 or 10-inch (250 mm) telescope, the nebula is visible as an extremely faint and large shell around the star.[6][1] The nearby 7th magnitude star on the west hinders observation, but one can view the nebula using averted vision.[6] Using a 16 to 18-inch (460 mm) scope, one can see that the faint nebula is irregular, being elongated in the north south direction.[6]
7635, bubble, nebula, redirects, here, bubble, nebula, barnard, galaxy, bubble, nebula, 6822, also, known, bubble, nebula, sharpless, caldwell, region, emission, nebula, constellation, cassiopeia, lies, close, direction, open, cluster, messier, bubble, created. Bubble Nebula redirects here For the Bubble Nebula in Barnard s Galaxy see Bubble Nebula NGC 6822 NGC 7635 also known as the Bubble Nebula Sharpless 162 or Caldwell 11 is an H II region 1 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 1 magnitude young central star SAO 20575 BD 60 2522 7 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 7 It was discovered in 1787 by William Herschel 5 The star BD 60 2522 is thought to have a mass of about 44 M NGC 7635Emission nebulaH II regionWide field image of NGC 7635 as captured by the Hubble Space TelescopeObservation data J2000 epochRight ascension23h 20m 48 3s 1 Declination 61 12 06 1 Distance7100 2 to 11000 3 4 ly 3 400 pc Apparent magnitude V 10 5 Apparent dimensions V 15 8 6 ConstellationCassiopeiaPhysical characteristicsRadius3 2 to 5 7 4 lyNotable featuresShell around SAO 20575 1 DesignationsBubble Nebula 1 Sharpless 162 Sh2 162 Caldwell 11See also Lists of nebulae Contents 1 Amateur observation 2 See also 3 Notes 4 References 5 External linksAmateur observation Edit NGC 7635 and its environs imaged through an 8 inch amateur telescope With an 8 or 10 inch 250 mm telescope the nebula is visible as an extremely faint and large shell around the star 6 1 The nearby 7th magnitude star on the west hinders observation but one can view the nebula using averted vision 6 Using a 16 to 18 inch 460 mm scope one can see that the faint nebula is irregular being elongated in the north south direction 6 See also EditLists of nebulaeNotes Edit a b c d e f g SIMBAD 2007 a b HubbleSite 2000 APOD 2004 sfn error no target CITEREFAPOD2004 help a b APOD 2006 sfn error no target CITEREFAPOD2006 help a b NGC IC Project Database Archived from the original on 2001 09 04 Retrieved 2008 12 15 a b c d Kepple amp Sanner 1998 a b c APOD 2005 sfn error no target CITEREFAPOD2005 help References EditSIMBAD February 23 2007 Results for NGC 7635 SIMBAD Centre de Donnees Astronomiques de Strasbourg Kepple George Robert Sanner Glen W 1998 The Night Sky Observer s Guide Vol 1 Willmann Bell Inc pp 108 109 ISBN 978 0 943396 58 3 HubbleSite 2000 An Expanding Bubble in Space Nemiroff R Bonnell J eds July 16 2004 The Bubble Astronomy Picture of the Day NASA Nemiroff R Bonnell J eds November 7 2005 NGC 7635 The Bubble Nebula Astronomy Picture of the Day NASA Nemiroff R Bonnell J eds October 18 2006 NGC 7635 The Bubble Astronomy Picture of the Day NASA Nemiroff R Bonnell J eds November 23 2016 NGC 7635 Bubble in a Cosmic Sea Astronomy Picture of the Day NASA External links Edit Wikimedia Commons has media related to NGC 7635 NGC7635 The Bubble Nebula NGC 7635 on WikiSky DSS2 SDSS GALEX IRAS Hydrogen a X Ray Astrophoto Sky Map Articles and images Bubble Nebula at Constellation Guide Portals Astronomy Stars Outer space Retrieved from https en wikipedia org w index php title NGC 7635 amp oldid 1119473149, wikipedia, wiki, book, books, library,
