Widefield Orion's Sword in HaRGB

The image here is the outcome of an idea that started last week, when I

saw Maurice Toet’s (mftoet) 4 pane Mosaic of Orion’s sword area, and

realised that it matched almost exacty the area I imaged in Hydrogen

Alpha at Kelling Heath a few weeks back. Maurice was kind enough to

provide me with the TIF file of the mosaic, and I set to work in

combining the two sets of data.


Using Registar, PixInsight and CS2, and adding in some Hydrogen Alpha

data as luminance for B33 and NGC2024 from Daz and TJ, the many many

hours of trial and error produced the following image. It was an

absolute joy to work on, and I am not sure it could be improved all that

much without a major rework from scratch. It is one of those images that

require a decently calibrated monitor, as my laptop screen shows it too

light and salmon pink, while my decent screens at home and at work all

show a vibrant Ha red in the background.


I would like to thank Maurice, Darren and Tim for all helping this

project by allowing me to use their data.


I hope you enjoy looking at this image as much as I have enjoyed working

on it!


RGB Mosaic Data

Name: Maurice Toet

OTA: Takahashi FSQ-106ED @ f/5

Imaging: Q453-HR (QHY8)

Mount: Losmandy GM-8

Taken from : Etoile St. Cyrice, Hautes-Alpes, France

Date: January 25 – 26 and 27 – 28, 2009

Web: Astrophotography by Maurice Toet | www.dutchdeepsky.com


Widefield Hydrogen Alpha data

Name: Steve Loughran

OTA: Borg 60 @ f/3.8

Imaging: SXVF M25C

Mount: EQ6

Taken from: Kelling Heath Star Party

Date: September 12th, 2010

Web: Steve’s Astro


RGB M42/M43/NGC1977 data (used as Luminance)

Name: Steve Loughran

OTA: Skywatcher 190 MakNewt @ f/5.3

Imaging: QHY8

Mount: EQ6

Taken from: Cambridge, UK

Date: December 6th, 2008

Web: Steve’s Astro


Horsehead (B33) Hydrogen Alpha data (used as Luminance)

Name: Darren Jehan

OTA: 12″ f/4 newtonian

Imaging: SXVF-H9

Mount: EQ6

Taken from: Kelling Heath Star Party

Date: September 12th, 2010

Web: The Alan Norman Observatory


Flame (NGC2024) Hydrogen Alpha data (used as Luminance)

Name: Tim Jardine

OTA: Celestron C9.25 @ ~f/6

Imaging: SX H9

Mount: EQ6

Taken from: Coventry,UK

Date: December 1st, 2009

s58y, Matt and 16 more people faved this
  • astrometry.net 5y

    Hello, this is the blind astrometry solver. Your results are:
    (RA, Dec) center:(84.533882384, -3.90836015014) degrees
    (RA, Dec) center (H:M:S, D:M:S):(05:38:8.132, -3:54:30.097)
    Orientation:87.75 deg E of N

    Pixel scale:16.49 arcsec/pixel

    Parity:Reverse ("Left-handed")
    Field size :4.69 x 2.87 degrees

    Your field contains:
    The star 42Ori
    The star θ1Ori
    The star θ2Ori
    The star ιOri
    The star 45Ori
    The star σOri
    The star Alnitak (ζOri)
    The star Alnitak (ζOri)
    NGC 1973
    NGC 1981
    NGC 1975
    NGC 1976 / Great Nebula in Orion / M 42
    NGC 1980
    NGC 1977
    NGC 1982 / M 43
    IC 434 / Horsehead nebula
    NGC 2023
    NGC 2024
    IC 435

    View in World Wide Telescope

    If you would like to have other images solved, please submit them to the astrometry group.
  • Xavier AMBS 5y

    Superbe et très impressionnant
    Bravo pour cette superbe photo !
  • dave halliday PRO 5y

    WOW !!
  • Ralph Ford PRO 5y

  • DIYastrophotography.webs.com PRO 5y

    A lot of great data for sure including yours and its very well blended which takes some real talent , excellent work Steve.
  • Harry Chen 5y

    Wonderful image!
  • Ken Mackintosh PRO 5y

    Great work steve. Agree with the point about profiling as well. It can be a little dis-heartening to think that many will view such a beautiful image some way different from what was intended, particularly with the reds. Although I am actually viewing on a laptop right now, I recently profiled it up. Viewing in safari as well, so think I am probably seeing it pretty much as was intended !
  • Leonardo Orazi 5y

    Stunning image and collaboration.

    Congratulations for tomorrow APOD ... ;-)

  • Curtis Horton PRO 5y

    Ditto to all of the above! (Even though I am a Flickr member, arrived here from APOD, lol)
  • Dangerous Dave Astrophotography 5y

    A super collaborative effort, congratulations to all involved.
  • bradosev 5y

    This has a beautiful feeling of depth to it. Amazing.
  • Sara Wager PRO 2y

    A fantastic image - WOW!!!
18 faves
Taken on September 28, 2010
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