Celestial hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble Nebula  ·  NGC 7635

Image of the day 03/23/2014

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    NGC 7635: THE BUBBLE NEBULA, Theodore Arampatzoglou
    NGC 7635: THE BUBBLE NEBULA
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    NGC 7635: THE BUBBLE NEBULA

    Image of the day 03/23/2014

    Getting plate-solving status, please wait...
      NGC 7635: THE BUBBLE NEBULA, Theodore Arampatzoglou
      NGC 7635: THE BUBBLE NEBULA
      Powered byPixInsight

      NGC 7635: THE BUBBLE NEBULA

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      Description

      NGC 7635, also called the Bubble Nebula and Sharpless 162, is a H II region[2] 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[2] magnitude young central star, the 15 ± 5 M☉[4] 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 Friedrich Wilhelm Herschel.[6] The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses.

      Tricolor Emission Line Image

      Instruments and exposure data:

      W.O FLT110 with dedicated TMB field flattener

      FeatherTouch 3'' focuser

      Starizona MicroTouch autofocuser

      W.O ZS80 ED

      SBIG ST10XME CFW9

      Meade DSI

      Filters:

      SII 8nm Baader Planetarium

      Ha 5nm Astrodon

      OIII 8.5nm Baader Planetarium

      Sky-Watcher EQ6 Pro

      SII :26*10min bin1x1

      Ha :20*10min bin1x1

      OIII:24*10min bin1x1

      Total exposure time:11h40min

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