Eta Carina around WR 22

[rat156]

This image is part of the Eta Carina Nebula entered around the Wolf-Rayet star WR 22 (the bright one in the middle), off to the right you can see the Eta Carina. Mapped in Hubble space telescope colours, with sulphur mapped to red, hydrogen to green and oxygen to blue.

About 8 hours of Ha, and 4 hours each of SII and OIII, though I lost some of the OIII due to cloud cover coming in in the early hours.

First pass processing, may collect some more data to correct the star colours, but I'm off doing the S'box Rally NZ as of Wednesday (please donate to http://tinyurl.com/pkksznb), so this might have to do.

Larger version here (https://flic.kr/p/DKn4r5)

Cheers
Stuart

[Atmos]

Lovely detail in the nebulosity, the ASA Newt performs well :)

[rustigsmed]

refreshing framing and looks great as is Stuart!

Cheers

[Placidus]

Excellent, Stuart.

The handling of the detail in the dust lanes is particularly striking.

Do you know if the boomerang wispy shock front structure strong in OIII about 20% of the frame-width to the left of WR22 is caused by the star?

Best,
Mike

[Paul Haese]

I really like the colour palette and detail Stuart. Well done in my opinion.

[rat156]

Hi Mike,
No idea, but a different treatment of the colour map shows it up much better. I'll post it when I get home.
Cheers
Stuart

P.S. Added crop of image around the region from an earlier iteration which shows the arc a little better (but the star colours were too hard to correct). Anyone know if this is part of the cast off from the WR star?

[Ryderscope]

Very nice detail Stuart. The colour palette works well.

[Andy01]

Echoing the above sentiments, lovely image, great use of colour and design, well done :)

[RickS]

Nice work on the dark neb.

[troypiggo]

Lovely image - detail, sharpness, colour palette, and contrast all nicely balanced.

[rat156]

Added crop of image to earlier post.

[alistairsam]

Incredible details Stuart. when you look at the lower 2/3rds of the nebula in full screen, its soo... real!!
totally in awe. Love the colours too, yep stars need some tweaking.
what was the fwhm of the raw subs?

Cheers
Alistair

[rat156]

H Alistair,

The subs were in the 2-3 arcsec FWHM range. The seeing was poor the night I took the Ha, guiding graph was showing major corrections.

I might reshoot the Ha when the seeing is a bit better and the object is a bit higher in the sky. I think that much of the variation was due to radiant heat from houses etc here in suburbia. Andy Campbell was out bush the same night and was raving about how good his guiding graphs were on Facebook. So it was most likely a local influence.

I also probably should have shortened the 15 minute subs. I shot some 2 minute RGB subs last night and some of them came in with a FWHM of 1-2, which is the best I can expect from Melbourne.

Cheers
Stuart