Hemisphere:  Southern  ·  Constellation: Aquarius (Aqr)  ·  Contains:  Helix nebula  ·  NGC 7293  ·  PK036-57.1
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NGC7293 Helix Nebula, 



    
        

            tommy_nawratil
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NGC7293 Helix Nebula

Getting plate-solving status, please wait...
NGC7293 Helix Nebula, 



    
        

            tommy_nawratil
Powered byPixInsight

NGC7293 Helix Nebula

Imaging Cameras
ZWO ASI1600MM-Cool
Filters
Astronomik H-Alpha 12nm · Astronomik LRGB 31mm
Software
Photoshop · Pleiades Astrophoto, S.L. Pix Insight · APT - Astro Photography Tool APT 3.13
Guiding Telescopes Or Lenses
Skywatcher 9x50 finder
Guiding Cameras
MGEN

Acquisition details

Dates:
Aug. 25, 2017
Frames:
115x180" (5h 45')
Integration:
5h 45'
Avg. Moon age:
3.84 days
Avg. Moon phase:
15.75%

RA center: 22h29m40s.44

DEC center: -20°5017.9

Pixel scale: 1.460 arcsec/pixel

Orientation: 97.870 degrees

Field radius: 0.338 degrees

More info:Open 

Resolution: 1332x999

Locations: Hakos Guest Farm, 100km past Windhoek, Namibia

Data source: Traveller

Description

The Helix strikes the Zenith in Namibia, so I took the advantage to try a photo in LRGB Ha and OIII channels, using an 8" f/4 Newtonian and ASI1600MMC in the south observatory of your Viennese club WAA. 28+14+12+14 x3min subframes LRGB and 24+23 x3min subframes Ha and OIII. Yes, 3min only each, ASI at zero gain, barely background limited in Namibia. ;-)

Presented are a crop on the main part of the Helix and its delicate interior structures, a 66% sized full field showing the outer portions in Ha alsong with some field galaxies, an annotated version, and a blink between Ha and OIII frames. How different the nebula looks in these channels!

Structures are enhanced a bit mostly by PixInsights HDR compression tool, only a little sharpening. The LRGB mix is just enhanced by NB in the weaker parts, and part of NB is used as a Luminance enhancement in the respective color channels.

Comments

Revisions

  • Final
    NGC7293 Helix Nebula, 



    
        

            tommy_nawratil
    Original
    NGC7293 Helix Nebula, 



    
        

            tommy_nawratil
    B
    NGC7293 Helix Nebula, 



    
        

            tommy_nawratil
    C
    NGC7293 Helix Nebula, 



    
        

            tommy_nawratil
    D

B

Description: full field

Uploaded: ...

C

Description: full field annotated

Uploaded: ...

D

Description: blink H-Alpha and OIII frames

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC7293 Helix Nebula, 



    
        

            tommy_nawratil