NGC 1763 - a combo of Old and New

[Slawomir]

Hi all,

While waiting for a clear night, I thought of trying to combine my old substandard data for this target (5-minute subs with distorted stars) and also new better quality data (10-minute subs).

All up about 9 hours of Ha, captured with my trusty and hard to replace 4" doublet from Paddington in Bris Vegas.

High res: http://www.astrobin.com/full/273012/B/?nc=user

Full res for the brave ones only: http://cdn.astrobin.com/images/thumbs/f0ba96a7b4ddb96f017419bef90bcfc3.16 536x16536_q100_watermark_watermark_ opacity-15_watermark_position-6_watermark_size-S_watermark_text-Copyright%20Slawomir%20Lipinski.jpg

Thank you for looking!
Suavi

[Placidus]

Truly excellent Suavi.

There are some lovely super-faint wisps in the far outskirts which are out of field in our shot. There are more of those tiny rice-grain nebulous blobs such as the one to the right of Thor's Other Helmet - glowing Bok globules perhaps - in the far bottom right.

One of the things that first most strongly attracted me as a nipper to astronomy is that what we read in our How and Why Wonder Books was really and truly up there (unlike just about everything else we're taught). It's nice to see that still applies - what's up there is repeatable and true - even if one uses a telescope.

Beautiful work.

[strongmanmike]

Nice cloudy nights work Suavi, lovely soft gaseous feel :thumbsup:

Mike

[RickS]

Looks great, Suavi!

[Slawomir]

Thank you M&T, Mike and Rick.

I have a long way to go yet, both with this image and in astrophotography in general, but a real possibility of an improvement, no matter where you are at, is IMO one of the best aspects of this addiction of ours :)

[Atmos]

Looking really good Suavi, pin point stars all over the place.. what more could one ask for :P

[PRejto]

Talk about sharp! Wow. Excellent combination of old and new. Do you plan anything further with the image? RGB or NB?

Peter

[Slawomir]

Thank you Colin. Actually, since the new mount guides more consistently, I have noticed a slight tilt in the optical train that was hidden before due to less accurate guiding...

[Slawomir]

Thank you Peter for your encouragement :)

Collecting more Ha as we speak, and hoping to at least collect OIII data as well before the end of January. RGB is forbidden for me for two reasons: heavy light pollution and my doublet has significant CA at f/5.6.

[Andy01]

This Forum needs a "Like" button :)
Well done Suavi - it will be interesting to see what colour map/mix you create.

I have personally struggled with getting the colour balance right this one - Paul Haese did a very nice rendition last year though, maybe that's a guide?

Looking forward to the final result :thumbsup:

[atalas]

Very nice Suavi!

[SimmoW]

Some targets look so nice in mono! Lovely crisp work Suavi.

[Slawomir]

Thank you Andy, Louie and Simon for encouraging me :hi:

Last night, in spite of pesky low clouds and horrible seeing, I decided to try to collect more data. After combining what I have managed to get so far (but not including old data), it can be noticed that in spite of lower noise, the image is now washed out (or maybe I am just seeing things). Seeing is everything! :lol:

4.2 hours (decent seeing): http://www.astrobin.com/full/273012/0/
7.8 hours (decent + bad seeing): http://www.astrobin.com/full/273012/C/

Thank you for looking!
Suavi

[Atmos]

If there is poor transparency (cloud effected) it'll destroy your low signal areas.

[Slawomir]

Agree. The thing is most of the data was collected between 30 to 40 degrees altitude and just over a hot roof of a neighbouring house, so not ideal anyway. Will experiment with combining all data I have and see whether the final result is okay. If yes, I could move on to OIII.

[Placidus]

G'day, Suavi,
I agree that in principle bad data can make things worse, and I've had to throw out whole nights for that reason, but in this case, there's no doubt in my mind: the 7.8 hrs is far better. Not just the greatly reduced noise, but the stars are sharper, and the faint wispy features are greatly improved in clarity. The slight overall milkiness is fixed in seconds by adjusting the zero point.

Love the 7.8 hr version, sharper and deeper. :thumbsup:

Best,
Mike

[Slawomir]

G'day Mike,

Thank you for your very kind feedback and for your advice :)

In the end I combined all Ha data (765 minutes) with drizzle integration. I think the overall result is not that bad after all, so I will start collecting OIII, probably after Xmas though.

High res: http://www.astrobin.com/full/273012/D/?nc=user

Full res: http://www.astrobin.com/full/273012/D/?nc=Slawomir&real=&mod=

Any constructive, or destructive feedback will be read carefully and taken into consideration.

Thank you for looking!

Suavi

[Slawomir]

A quick update. The Ha integration is now up to 14.4 hours, but it looks like collecting O3 and S2 will need to wait for another season. Anyway, it was fun trying to reveal as much as possible in this fascinating patch of the sky from my location and with my 4" doublet.

http://www.astrobin.com/full/273012/E/?nc=Slawomir&real=&mod=

Thank you for looking!
Suavi

[Geoff45]

Good capture of an interesting object Suavi.
Geoff

[SimmoW]

I really love the detail in this, well done Suavi. Will be amazing in colour

[strongmanmike]

A great Ha shot of a cool target :thumbsup:

Mike

[multiweb]

Nice one. The highres is superb.:thumbsup:

[Slawomir]

Thank you gents for your encouragement. Collecting data for this target has been a looooong journey, and I have not started yet working on OIII and SII! :lol: Next year, maybe...:prey: