Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Bubble nebula  ·  IC 1470  ·  M 52  ·  NGC 7538  ·  NGC 7635  ·  NGC 7654  ·  The star 10Tau  ·  The star 11Peg  ·  The star 16Psc  ·  The star 1Cas  ·  The star 25Aqr  ·  The star 30Cep  ·  The star 44Psc  ·  The star 4Cas  ·  The star 5Psc  ·  The star λPsc

Image of the day 04/09/2016

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    The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang
    The Border between Cassiopeia and Cepheus
    Powered byPixInsight

    The Border between Cassiopeia and Cepheus

    Image of the day 04/09/2016

    Getting plate-solving status, please wait...
      The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang
      The Border between Cassiopeia and Cepheus
      Powered byPixInsight

      The Border between Cassiopeia and Cepheus

      Imaging Telescopes Or Lenses
      Takahashi Epsilon 180ED
      Imaging Cameras
      Nikon D800 Mod
      Mounts
      iOptron CEM60-EC
      Software
      PixInsight · Starnet ++ · RegiStar · Photoshop CC
      Guiding Telescopes Or Lenses
      SharpStar 50 ED
      Guiding Cameras
      Fishcamp Starfish

      Acquisition details

      Dates:
      Oct. 8, 2015 ·  Oct. 9, 2015 ·  Oct. 17, 2015 ·  Oct. 18, 2015
      Frames:
      185x180" (9h 15') ISO800
      Integration:
      9h 15'
      Avg. Moon age:
      15.27 days
      Avg. Moon phase:
      18.02%
      Bortle Dark-Sky Scale:
      1.00

      RA center: 23h05m18s.2

      DEC center: +61°2114

      Pixel scale: 4.241 arcsec/pixel

      Orientation: 1.231 degrees

      Field radius: 5.001 degrees

      Resolution: 7340x4270

      Locations: Maunakea, Hilo, Hawaii, United States

      Data source: Traveller

      Description

      This is a six-frame mosaic. The overlap between the six frames is very large along the east-west direction, so the total FOV is probably only slightly larger than a standard four-frame mosaic. The original image has 125 Mega pixels.

      Bonus track:

      Rev. B is a four-frame mosaic image of a wider area made with the Sigma APO 180mmm/F2.8 at F2.8. Each frame has an exposure time of 42 minutes. The camera is also a modified Nikon D800.

      Rev C is a two-frame mosaic image of an even wider area made with the Sigma Art 50mm/F1.4 at F4.0. The total exposure time is 1.0 hr. Same camera.

      These two wide-field images were used to construct models of the sky gradient in the main mosaic, to achieve a flat background and a seamless mosaic. Feel free to use these images as your finding chart to look for your future imaging targets.

      Rev E (final) is a reprocessing in 2020, particularly with the help from starnet++.

      The original image has 125 mega pixels. The one uploaded here is a 0.5x reduction. Enjoy.

      Comments

      Revisions

        The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang
        Original
        The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang
        B
        The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang
        C
      • Final
        The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang
        E

      Sky plot

      Sky plot

      Histogram

      The Border between Cassiopeia and Cepheus, 



    
        

            Wei-Hao Wang

      In these public groups

      Deep Sky Mosaics