Dust of Orion Nebula (ESO 2.2m telescope)

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    I've tried to use some new combination of channels, to reveal reflecting dust parts of M42 nebular complex.

    R = HAlpha - Continum
    G = Continum
    B = Continum - Halpha * 0.05

    Substracting H-alpha frame from "continuum", helps to emphasize reflecting dust clouds over bright emitting hydrogen.

    Source FITS used:

    All images was taken in 2-3 Jan 2005. WFI camera, 2.2m telescope. HDR composition of 10 frames 30 sec and 10 x 280 sec for each filter. Also single 3sec frames per filter was used for anti-blooming. Filter 620/17 (ESO866) used as "h-alpha continuum image" (I do know that it is need to use 665/12 in pair to make real "continuum" image, but there are no such images in base, so I had a problems with clear substraction of stars with different spectral class). Stars was also detached in G & B channels for independent processing.

    DARK / BIAS / FLAT calibration, WFI mosaic reprojection in IRAF. Images registration and composition - Iris. Weightened sigma-clipping addition - FITs Stacker. Post-processing and residual artifacts retouching - Adobe Photoshop CS2.

    Click here for LARGE image. (5.0Mb, 50% of post-processing size, or 25% of camera resolution)

    Oleg Astro, gabrielk1, Emteehed, and 78 other people added this photo to their favorites.

    1. gabrielk1 41 months ago | reply

      wow this is just stunning, so much detail, color, amazing

    2. gatoso 41 months ago | reply

      definitely you've got my vote!

    3. dacanata 40 months ago | reply

      wooooooooooooooooooow !!!!!

    4. the_volpetta 40 months ago | reply

      sticazzi! cioè, volevo dire.... amazing!

    5. igorfp 40 months ago | reply


      BTW, I thought that this one had better chance to win then M78 :-)

      "H-alpha minus continum" to get clean H-alpha emission image is common technique. But here I tried "continum - halpha" for other channel as the way to separate and emphasize dust clouds by the color. AFAIK it's new trick and it can be used for many objects having dust and hydrogen mix. M20 "Trifid" nebula is the best next target.

    6. thegreatlandoni 39 months ago | reply

      Excellent work ! ... My new desktop image.

    7. Claudio © 39 months ago | reply


    8. Nathan Spotts Photography [deleted] 38 months ago | reply


    9. janvavrusa 32 months ago | reply

      Unbelievably great!

    10. Elfarsah 30 months ago | reply

      Орион моё любимое созвездие. Неужели вблизи он ещё красивее. Бесподобное фото.

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