Rosette Nebula, HaRGB

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Happy valentine's day!

I finally had a clear (and cold!) night to capture some RGB data to go with the hydrogen-alpha from a few weeks ago. (My OIII efforts during the full moon were a waste, too many gradients thanks to the moon.)

So here is a first draft -- I will have another crack at processing this one soon. Somehow all the orange/yellow stars got washed out, and the background is somewhat noisy.

In terms of integration time (minutes), for Ha:R:G:B it's 180:45:45:45, with the RGB channels binned 2x2. So not a ton of colour there.

Thanks for looking,
Adam

Jarle Grindhaug, and 74 other people added this photo to their favorites.

View 4 more comments

  1. write_adam 51 months ago | reply

    Thanks for the kind words everybody!

    Annie, they were 9 X 20 minutes for the Ha, and 9 X 5 minutes binned 2x2 for the RGB.

  2. Mike Cialowicz 51 months ago | reply

    Wow, absolutely sublime...

  3. Jοey 51 months ago | reply

    Always impressed with your work my friend.. love the addition of RGB data.. very nice! You're going to be unstoppable with the new SBIG camera! :)

  4. jdmuth 51 months ago | reply

    That is awesome, beautiful image!!!

  5. Riccardo Matteoli 51 months ago | reply

    good work!!!!! if i only could find a clear night...

  6. Anna (www.eprisephoto.com) 51 months ago | reply

    Adam - see this is really why I need to get a wedge! I decided to upgrade my camera first though so the wedge is gonna have to wait even longer. If you have time one day can you shoot me a message explaining binning to me? My new camera has that ability and my old one didnt so more learning for me!

  7. sedo_5 51 months ago | reply

    perfectly done!

  8. Xavier Ambs 51 months ago | reply

    Oh yes it's a great shoot

  9. Paul Rumsey 51 months ago | reply

    Hi, I'm an admin for a group called Sky @ Night, and we'd love to have this added to the group!

  10. liphotos 51 months ago | reply

    Oh wow, just stunning!

  11. write_adam 51 months ago | reply

    Hi everyone! Thank you so much for the kind comments. Sorry I haven't dropped by Flickr in a while so I missed the last few.

    @Annie - absolutely, re binning it's basically a technique (available via software for most astro CCD cameras) to increase light -gathering at the expense of lower resolution. Binning 1x1 is the same as not binning at all. Binning 2x2 is essentially treating a 4-square area of pixels (2 by 2) as one large pixel -- it therefore gathers 4 times the photons of a single pixel. It is however 1/4 the resolution of an unbinned CCD. 3x3 binning does the same for a square of 9 pixels, 4x4 for 16, etc.

    The advantage of binning is that you can capture sufficient light signal in a fraction of the time required for an unbinned photo.

    By using LRGB blending techniques, you can therefore capture Luminance at 1x1, and colour at 2x2 or higher, but blend the colour from the 2x2 into the resolution of the unbinned, 1x1 image. Best of both worlds!

    Hope this helps.

    Cheers,
    Adam

  12. Wherever I Roam 49 months ago | reply

    I'm not really fluent on astro-speak, but this is stunning! ..you rawk man!

  13. AngelikaRaven 45 months ago | reply

    um.. is it just me ...or does it look alot like a skull???
    i dont understand the techy stuff ..but your work is fab!!!

  14. Cardigan Lane 45 months ago | reply

    Was about to say the same thing... looks like a skull to me too...crazy!

  15. UNNÖTIGdigga. 44 months ago | reply

    WOW i love this

  16. perekepa 30 months ago | reply

    ¿Os habeis dado cuenta de que parece una calavera?
    Have you noticed that looks like a skull?
    ;)

  17. rickpickett 7 months ago | reply

    bad ass, dude... looking forward to seeing more of your stuff!

  18. write_adam 7 months ago | reply

    It does!

    Thank you sir, much appreciated!

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