Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)

Image of the day 09/26/2018

    Barnard 175 - Cosmic Curiosities, 



    
        

            Jason Guenzel
    Barnard 175 - Cosmic Curiosities
    Powered byPixInsight

    Barnard 175 - Cosmic Curiosities

    Image of the day 09/26/2018

      Barnard 175 - Cosmic Curiosities, 



    
        

            Jason Guenzel
      Barnard 175 - Cosmic Curiosities
      Powered byPixInsight

      Barnard 175 - Cosmic Curiosities

      Technical card

      Imaging telescopes or lenses: CELESTRON EdgeHD 800

      Imaging cameras: ZWO ASI1600MM-Cool

      Mounts: Orion Atlas Pro AZ/EQ-G

      Guiding telescopes or lenses: CELESTRON EdgeHD 800

      Guiding cameras: ASI120MM

      Focal reducers: Celestron 0.7x Focal Reducer

      Software: Sequence Generator Pro  ·  PixInsight  ·  Adobe Photoshop  ·  PHD 2

      Filters: Astronomik Deep-Sky R 1.25"  ·  Astronomik Deep-Sky B 1.25"  ·  Astronomik Deep-Sky G 1.25"  ·  Astronomik L-3 UV-IR Block 1.25"  ·  Astronomik H-alpha 6nm CCD 1.25"

      Accessory: Moonlite CHL 2.5" Large Format Crayford Edge Focuser  ·  Orion Thin Off-Axis Guider (TOAG)


      Dates:Aug. 23, 2018Aug. 24, 2018Aug. 31, 2018Sept. 5, 2018Sept. 11, 2018Sept. 12, 2018Sept. 13, 2018Sept. 16, 2018Sept. 17, 2018Sept. 18, 2018

      Frames:
      Astronomik Deep-Sky B 1.25": 30x240" (2h) (gain: 0.00) -20C bin 1x1
      Astronomik Deep-Sky G 1.25": 30x240" (2h) (gain: 0.00) -20C bin 1x1
      Astronomik Deep-Sky R 1.25": 30x240" (2h) (gain: 0.00) -20C bin 1x1
      Astronomik H-alpha 6nm CCD 1.25": 140x240" (9h 20') (gain: 139.00) -20C bin 1x1
      Astronomik L-3 UV-IR Block 1.25": 215x180" (10h 45') (gain: 0.00) -20C bin 1x1

      Integration: 26h 5'

      Darks: 50

      Flats: 50

      Bias: 256

      Avg. Moon age: 10.18 days

      Avg. Moon phase: 48.58%

      Bortle Dark-Sky Scale: 5.00


      Basic astrometry details

      Astrometry.net job: 2263494

      RA center: 22h 13' 49"

      DEC center: +70° 17' 27"

      Pixel scale: 0.527 arcsec/pixel

      Orientation: 180.545 degrees

      Field radius: 0.396 degrees


      Resolution: 3234x4348

      Data source: Backyard

      Description

      In the constellation of Cepheus, a long pillar of dark dust (the Bok Globule, Barnard 175) terminates in a brilliant sapphire reflection nebula (vdB 152, Cederblad 201).

      This image contains other curiosities, too. The long red hydrogen alpha filaments of a supernova remnant (SNR 110.3+11.3) appear to intertwine through the background. Embedded in the dusty pillar and showing a vibrant red, a forming star with polar jets of ionized gas interacts with the interstellar medium (Herbig Haro object, HH450). The inner pocket of the reflection nebula has some interesting arcs of material lit from within and is somewhat reminiscent of the Iris Nebula. I didn't have the FOV for it, but just off the lower right of the frame is an ancient planetary nebula that emits in Ha and OIII. We are peering through a fairly busy part of the Milky Way, but amazingly there are at least a couple background galaxies visible.

      I found this image to be a particular challenge on the processing side. The dark nebula is exceedingly faint in luminance and the supernova remnant was even dimmer in hydrogen alpha emission.

      If you ask me, this complex nebula looks most like a baby penguin looking skyward.

      Enjoy!

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