Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)

Image of the day 01/11/2022

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    A helping hand in Cassiopeia, 



    
        

            Jon Talbot
    A helping hand in Cassiopeia
    Powered byPixInsight

    Image of the day 01/11/2022

    Getting plate-solving status, please wait...
      A helping hand in Cassiopeia, 



    
        

            Jon Talbot
      A helping hand in Cassiopeia
      Powered byPixInsight

      Equipment

      Imaging Telescopes Or Lenses
      Stellarvue SVX152T
      Imaging Cameras
      ZWO ASI6200MM Pro
      Mounts
      Paramount MyT
      Filters
      Chroma 50mm Blue · Chroma 50mm Red · Chroma 50mm Green · Chroma 50mm Luminance
      Accessories
      Stellarvue Large Format Flattener
      Software
      Software Bisque The Sky X · PixInsight 1.8
      Guiding Telescopes Or Lenses
      Stellarvue SVX152T
      Guiding Cameras
      Starlight Xpress Lodestar Autoguider X2

      Acquisition details

      Dates:
      Oct. 8, 2021
      Frames:
      Chroma 50mm Blue: 36x300" (3h) (gain: 100.00) -5C bin 2x2
      Chroma 50mm Green: 38x300" (3h 10') (gain: 100.00) -5C bin 2x2
      Chroma 50mm Luminance: 59x300" (4h 55') (gain: 100.00) -5C bin 2x2
      Chroma 50mm Red: 39x300" (3h 15') (gain: 100.00) -5C bin 2x2
      Integration:
      14h 20'
      Darks:
      30
      Flats:
      16
      Bias:
      60
      Avg. Moon age:
      2.27 days
      Avg. Moon phase:
      5.74%
      Bortle Dark-Sky Scale:
      1.00
      Mean SQM:
      22.00

      Basic astrometry details

      Astrometry.net job: 5361782

      RA center: 02h51m44s.9

      DEC center: +69°1348

      Pixel scale: 1.278 arcsec/pixel

      Orientation: 181.439 degrees

      Field radius: 1.009 degrees

      Resolution: 4743x3132

      Locations: Okie Tex Star Party, Kenton, Oklahoma, United States

      Data source: Traveller

      Description

      This image shows a marvelous and busy area in the constellation Cassiopeia. It contains a large amount of dust, several dark nebula and several reflection nebula along with two interesting stars. Near the top center is the star SU Cassiopeiae which is a Cepheid variable at Mag 5.94. SU Cass is a Yellow giant with a spectral class of F5:lb-11. It's 19 times larger than our sun. SU Cass lies 1289 light years distant. Surrounding it is the blue reflection nebula VdB 9 which is lit up by SU Cass. The blue wisps extend quite a ways around this area. The other interesting star in the lower center left is the star RZ Cassiopeiae. RZ Cass is a white A3V main sequence star at mag 6.26. It's an eclipsing variable star which is 219 light years distant. The bluish nebulosity surrounding it is listed as VdB 7. However RZ Cass is apparently not the source to light up VdB 7 but another smaller 11th mag star nearby. Several dark nebula are right of center in the image. The upper part of this nebula looks like an opened hand, hence the nickname (The helping hand). The dark area of the hand, near the top finger is designated as LDN 1357 and below it near the palm, LDN 1355. The long dark area near center right is the dark nebula LDN 1358. Throughout this entire area encompassing the field of view is lots of molecular dust of varying thickness and color. Check out the annotated image  on my website showing where these objects are. Also check out the full res image to see lots of interesting detail. This image was taken under the dark skies of the Okie Tex Star Party in October 2021. It encompasses 14.3 hrs of exposure time using LRGB filters.

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      A helping hand in Cassiopeia, 



    
        

            Jon Talbot