Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  Bubble nebula  ·  NGC 7635  ·  NGC7635  ·  Sh2-162

Image of the day 07/21/2016

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    Bubble Nebula Ha and HaOIII - NGC 7635, 


            Thomas Richter
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    Bubble Nebula Ha and HaOIII - NGC 7635

    Technical card

    Imaging telescopes or lenses: GSO 8" f/5 Newton

    Imaging cameras: Moravian G2-8300FW

    Mounts: SkyWatcher NEQ6 Pro Goto

    Guiding telescopes or lenses: Viewfinder 8x50

    Guiding cameras: Astrolumina Alccd5L-IIc

    Focal reducers: TS Coma corrector 2"

    Software: PHD2 Guiding  ·  DSS, Fitswork, Gimp

    Filters: Baader Planetarium O3 1.25" 8.5nm  ·  Baader Ha 2" 7nm

    Dates:July 18, 2016July 19, 2016

    Baader Ha 2" 7nm: 18x600" -20C bin 1x1
    Baader Planetarium O3 1.25" 8.5nm: 16x600" -20C bin 2x2

    Integration: 5.7 hours

    Flats: ~20

    Bias: ~100

    Avg. Moon age: 13.80 days

    Avg. Moon phase: 98.69%

    Temperature: 19.50

    Astrometry.net job: 1339648

    RA center: 23h 20' 46"

    DEC center: +61° 10' 51"

    Pixel scale: 1.220 arcsec/pixel

    Orientation: -45.406 degrees

    Field radius: 0.604 degrees

    Resolution: 2862x2126

    Locations: Nürnberg, Nürnberg, Bayern, Germany


    Rev. B: added OIII data for Bicolor image

    Object description (wikipedia.org) :

    NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, 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 wind from a massive hot, 8.7 magnitude young central star, the 15 ± 5 M☉ 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 1787 by William Herschel. The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses.



      Bubble Nebula Ha and HaOIII - NGC 7635, 


            Thomas Richter
    • Final
      Bubble Nebula Ha and HaOIII - NGC 7635, 


            Thomas Richter

    Sky plot

    Sky plot


    Bubble Nebula Ha and HaOIII - NGC 7635, 


            Thomas Richter

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