Quote:
Originally Posted by rally
Steve,
Looked it up in Aladin
Its laballed as a Galaxy
Their photo shows it to be much less red than your image
Ive attached a couple of screen shots of your image on left and theirs on the right normal and zoomed right in
I ran out of time to check the angular dimensions in both your image and the Aladin data, but that would be my next step - its supposed to be 1.4x1.1arc mins
Could there be a galaxy in the middle of dim nebula ?
Or have you just enhanced the galactic glow and increased its red by the enhanced Ha contribution ?
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As well as Aladin There are two other catalogs (PGC and IRAS) that call it a galaxy. My RGB image (without the Ha) shows the same dimensions as my final image so I don't think the Ha has distorted the final result. I don't know the answer to your question. My UK colleague who prompted me to image it in the first place is convinced it's a nebula.