Ngc 253

[rat156]

An unexpected clear night over Melbourne last night.

NGC 253, LRGB, 230, 35, 60, 60 minutes. Some of the first batch of red subs had a severe gradient in them so I discarded them, I think it was my neighbour's roof.

Larger version here (https://www.facebook.com/photo.php?fbid=243829779101068&set=o.620654114646446&type=1&theater)

Cheers
Stuart

[jase]

Enjoyed the crisp details Stuart. Shame about the gradient drama and ditching the data. Background could be cleaner with the application of flats, but hey any imaging being done in Melbourne of late is good imaging. Apparently the wettest year in the last three decades. Well done. Thanks for sharing.

[DavidU]

Very nice ! Amazing for Melbourne.

[Ross G]

Very nice looking galaxy photo Stuart.

I like the colours.

Ross.

[rat156]

Hi Jase,

I really need to take some flats, should have done it last night, but was a bit buggered. The weather of late has been almost the opposite of what I expect, cloudy days and then, just as the sun is setting, the skies have cleared. The main problem then is waiting for the scope to cool so the focus doesn't shift too much. If I had my eye on the weather earlier I would have had the fans running much earlier.

Do you think that the focus change from low temperature to ambient Melbourne would change the appearance of the dust bunnies enough to make flat application difficult?

Cheers
Stuart

[Spookyer]

Nice one:thumbsup:

[alpal]

I didn't notice the clear sky over Melbourne.
The weather has been lousy for 5 months.

Anyway - a nice job.

[RickS]

A nice NGC 253, Stuart!

[RobF]

Yep, that's a great image

[strongmanmike]

Not bad Stu, not very big image though... :shrug: Love the diffraction spikes you get there, remind me of images by the Crossley reflector at the Lick Obs

I say yep go for flats, any temp related focus shift shouldn't make too much difference and the the result with out those distracting doughnuts will be worth it :thumbsup:

Mike

[Paul Haese]

Count me in on the application of flats too Stuart. Looks like pretty good data.

[rat156]

Hi Mike,

OK, I'll do some flats. Image size is very much limited by the 200k limit here. The Facebook one is bigger, but still only 70% of full resolution though. I'll put some full res pics up on my website soon as well.

Cheers
Stu

[rat156]

Hi All,

Took some flats tonight. Reprocessed the image, flat reduction still not perfect, but it enabled me to push the processing a little further.

Cheers
Stuart

[multiweb]

Really great details. I like the colors in the repro. Very nice. :thumbsup:

[naskies]

Fantastic detail - great image!

[astronobob]

Awesome Galaxy details :thumbsup: :thumbsup:

[RickS]

Very nice, Stuart!

[lazjen]

Nice image, like the details.

[Shiraz]

yep, fine detail good colour - very nice image Stuart