Hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  7 eta Gem  ·  IC 443  ·  Sh2-248  ·  Tejat Prior  ·  The star Propus (ηGem)
Getting plate-solving status, please wait...
IC443 - Jellyfish Nebula, 



    
        

            Nico Carver
Powered byPixInsight

IC443 - Jellyfish Nebula

Getting plate-solving status, please wait...
IC443 - Jellyfish Nebula, 



    
        

            Nico Carver
Powered byPixInsight

IC443 - Jellyfish Nebula

Imaging Telescopes Or Lenses
Sky-Watcher 80ED
Imaging Cameras
ZWO ASI1600MM-Cool
Mounts
Orion Atlas EQ-G
Filters
Astrodon Tru-Balance 1.25" 5nm Ha · Astrodon Tru-Balance 1.25" 3nm OIII
Accessories
Shoestring Astronomy EQDIR · Sky-Watcher 0.85 Focal reducer/flattener
Software
Photoshop CS6 · PHD2 Guiding · Main Sequence Software Sequence Generator Pro · Pixinsight 1.8 · Cartes du Ciel
Guiding Telescopes Or Lenses
Orion 50mm Guide Scope with helical focusing
Guiding Cameras
QHYCCD 5L-II M

Acquisition details

Dates:
Feb. 5, 2017 ·  Feb. 26, 2017 ·  March 16, 2017
Frames:
Astrodon Tru-Balance 1.25" 3nm OIII: 20x300" (1h 40') (gain: 139.00) -20°C bin 1x1
Astrodon Tru-Balance 1.25" 5nm Ha: 53x300" (4h 25') (gain: 139.00) -20°C bin 1x1
Integration:
6h 5'
Darks:
20
Avg. Moon age:
18.88 days
Avg. Moon phase:
50.21%
Bortle Dark-Sky Scale:
8.00
Temperature:
10.00

RA center: 06h17m02s.91

DEC center: +22°3512.4

Pixel scale: 1.502 arcsec/pixel

Orientation: -74.510 degrees

Field radius: 0.817 degrees

More info:Open 

Resolution: 2888x2648

Locations: Backyard, Newark, Delaware, United States

Data source: Backyard

Comments

Revisions

  • IC443 - Jellyfish Nebula, 



    
        

            Nico Carver
    Original
  • IC443 - Jellyfish Nebula, 



    
        

            Nico Carver
    B
  • IC443 - Jellyfish Nebula, 



    
        

            Nico Carver
    C
  • Final
    IC443 - Jellyfish Nebula, 



    
        

            Nico Carver
    D

B

Description: First try at combining Ha and OIII data. Used Edoardo Luca Radice's PixInisght variation on the Steve Cannistra method for bicolor composition.

Uploaded: ...

C

Description: More natural looking, different methods used for processing.

Uploaded: ...

D

Description: Added another 1.5 hours of Ha. Tried to keep what was working in version "C", but improve the stars and chrominance noise reduction. Also, noticed some dark ringing around the stars in the bright shell of the jellyfish in version C, which I eliminated in D. Might be done for this winter, but next winter I would like to extend this to μ Gem and make this a 2-panel mosaic. Comments welcome!

Uploaded: ...

Sky plot

Sky plot

Histogram

IC443 - Jellyfish Nebula, 



    
        

            Nico Carver