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Old 10-09-2016, 06:11 PM
Placidus (Mike and Trish)
Narrowing the band

Placidus is offline
 
Join Date: Mar 2011
Location: Euchareena, NSW
Posts: 3,719
Wow, Fred! That's special!

Trish immediately saw the brightest part of the nebula as a bird flying toward us, head and beak pointed toward our left. It's very obvious when you see it.

When I look at a narrowband image, I basically ignore the stars and look at the nebulosity, which is what you took the photo for. The faint extensions are really something. Crisp and clean and beautiful.

The 2x2 binning was obviously necessary. My impression is that despite being an SNR, there's very little SII in the image.

Is it just conceivable that using H-alpha as luminance is concealing some of the SII, particularly further out where there's less H-alpha?

Wonderful work.

Mike
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