Hemisphere:  Southern  ·  Constellation: Orion (Ori)  ·  Contains:  Flame Nebula  ·  IC 431  ·  IC 432  ·  IC 434  ·  IC 435  ·  NGC 2023  ·  NGC 2024  ·  Orion B  ·  The star Alnitak (ζOri)  ·  The star σOri
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IC 434 - a light show, 



    
        

            Tom Gray
IC 434 - a light show
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IC 434 - a light show

Getting plate-solving status, please wait...
IC 434 - a light show, 



    
        

            Tom Gray
IC 434 - a light show
Powered byPixInsight

IC 434 - a light show

Technical card

Imaging telescopes or lenses: William Optics Zenithstar II 80 ED

Imaging cameras: Meade DSI 3 Pro

Mounts: Meade Fork mount w/wedge Meade

Guiding telescopes or lenses: Meade 8x50mm Finder/Guider

Guiding cameras: Orion Starshoot autoguider

Focal reducers: Meade f3.3 focal reducer/field flattener Meade Focal reducer

Software: SiliconFields / Ivo Jager Startools v1.7  ·  Stark Labs Nebulosity v3  ·  PHD2 Guiding V 2.6  ·  Meade Envisage V4.05

Filters: Optolong L-eNhance 1.25"

Accessory: Homemade ST4 autoguider


Dates:Dec. 15, 2020

Frames: 27x120" (54')

Integration: 54'

Avg. Moon age: 0.92 days

Avg. Moon phase: 0.95%


Basic astrometry details

Astrometry.net job: 4116393

RA center: 5h 40' 42"

DEC center: -2° 8' 24"

Pixel scale: 4.019 arcsec/pixel

Orientation: 88.472 degrees

Field radius: 0.981 degrees


Resolution: 1371x1099

Locations: Home 'observatory' (Bortle 5), Derbyshire, United Kingdom

Data source: Backyard

Description

IC 434 provides the perfect backdrop and sets the stage for the horsehead 'nebula' (B33) and friends. It is easy to be distracted by the flame nebula in dazzling colour, and there is a danger of overlooking the subtle detail and H emissions that envelope this region. Notoriously difficult visually, the emissions and the dark horse pop our with narrowband filters.

This image comprises just under an hour with my L-eNhance filter, using 120s subs. There is a fair amount of walking noise, in part because I combined two image sets, after my Dec motor was slipping, but also the short exposures (limited to 2m due to some wind). Much cleaner than my earlier widefield attempt using a Pentax lens, the Zenithstar certainly has better optics.

As usual, captured in Envisage, stacked in Nebulosity and processed in Startools. A standard workflow, but I did have to repair a few slightly deformed stars towards the edge of the field.

Comments

Revisions

  • IC 434 - a light show, 



    
        

            Tom Gray
    Original
  • IC 434 - a light show, 



    
        

            Tom Gray
    B
  • Final
    IC 434 - a light show, 



    
        

            Tom Gray
    C

B

Description: This version was stacked and aligned in Penumbra v0.6 with gentle HDR brightening and sharpening, improving the contrast. I much prefer this 'less is more' approach, and over-processed the original in Startools v1.7 I remind myself that there is no substitute to sufficient exposure and integration!

Uploaded: ...

C

Description: Brightened and sharpened further in Penumbra. Obvious artefacts around some stars, but I'm pleased with the extra detail achieved by being a bit more bold...

Uploaded: ...

Sky plot

Sky plot

Histogram

IC 434 - a light show, 



    
        

            Tom Gray