View Full Version here: : Semi hi-res M42 core
Dennis
05-02-2011, 09:57 PM
Hello,
It took me some 2 hours to collect this data through gaps between sets of clouds in Brisbane last night, and in that period, all I managed to acquire was 5 seconds Lum and 10 seconds each of R, G & B; 35 seconds of data for 2 hours effort!:(
Rather than let it go to waste, I decided to process the data and I was surprised how well it held up. The six brighter stars of the Trapezium, A to E, have been nicely resolved.
Tak Mewlon 180 F12 at prime focus (2160mm fl) with an ST2000XM and CFW9.
Thanks for looking!
Dennis
h0ughy
05-02-2011, 10:07 PM
tuti fruity colours Dennis - very sharp - how do you get 6 spikes? the trap look good
Mighty_oz
05-02-2011, 10:08 PM
Pretty amazing stuff hey, guess it all adds up. Like the colours too.
ballaratdragons
05-02-2011, 10:16 PM
Great work Dennis!
E & F are plainly visible :thumbsup:
On your original image can you see G & H?
I used to love imaging the trap :)
John Hothersall
05-02-2011, 10:39 PM
Thats a great close in shot of the trap area with strong green emmission and lovely reds.
John.
Paul Haese
06-02-2011, 11:36 AM
Looks well defined and nice colours too. I like the trap stars.
Lester
06-02-2011, 12:48 PM
Very nice close-up view Dennis. Thanks.
DavidU
06-02-2011, 01:06 PM
A fine image Dennis, great colour & detail.
irwjager
06-02-2011, 04:11 PM
That's pretty cool for such little data. Kudos for sticking with it and giving processing bash nonetheless - I love the result! There's something very eerie about the trapezium in this pic. Like it's staring at you... :P
I reckon the Tak in question has got 3 spider vanes?
Dennis
06-02-2011, 10:00 PM
Hi Dave
Thanks for your comments, I like garish colours and the Mewlon has 3 spider vanes, hence the 6 spoke diffraction patterns. On bright stars, the 3 vanes act much like a Bahtinov Mask – quite a nice design feature from Mr Takahashi!
Hope you guys get some relief from the unrelenting heat soon!
Thanks Mighty_oz – I like the colours too!
Thanks John – It’s been several months (poor weather) since I last managed to set up and I appreciate your comments.
Thanks Paul – I appreciate your comments.
Thanks Lester – it’s always good to hear from you.
Thanks David – I was really surprised at how this turned out with only 35 seconds of exposure. It shows how bright this region is and how sensitive the SBIG ccds are.
Thank Ivo – I appreciate your comments and you’re spot on – the Tak Mewlons have 3 spider vanes.
Cheers
Dennis
Dennis
06-02-2011, 10:08 PM
Hi Ken
Thanks! I re-visited the Lum frame and after digging around in the bowels of the data, I think that I found G, H1, H2 and I as well. I re-sampled the data upwards to dig these faint fellas out and I think that they are real stars and not processing artefacts.
An impressive feat for the Tak 180 F12 at prime focus (2160mm). I didn’t get much of an opportunity to assess the seeing due to the clouds, but I suspect it must have been very good to resolve these details in a 5 sec exposure.
Here are some data from SkyTools describing this multiple star system:
Theta 1 Ori, Multiple Star System, Magnitude: 5.13
AB: 5.13+6.35 mag, In 1991: PA 312° Sep 12.87"
AC: 5.13+7.2 mag, PA 56° Sep 13.12"
AD: 5.13+7.49 mag, PA 342° Sep 16.87"
AE: 5.13+6.4 mag, PA 134° Sep 135.30"
EF: 6.4+7.5 mag, PA 92° Sep 52.50"
EG: 6.4+9.1 mag, PA 97° Sep 128.70"
BH: 6.35+11.1 mag, Sep 4.10"
AI: 5.13+11.5 mag, PA 122° Sep 4.00"
Cheers
Dennis
DavidU
06-02-2011, 10:13 PM
Fine work again Dennis !
strongmanmike
06-02-2011, 11:19 PM
Excellent result from a few seconds of work Dennis :thumbsup:
Love the colours in the original too.
MIke
multiweb
07-02-2011, 08:54 AM
Love that shot. Real nice. :thumbsup:
iceman
07-02-2011, 09:03 AM
Nice to see more from you Dennis, welcome back!
danielsun
07-02-2011, 09:56 AM
Wow Dennis, I don't think I seen the trap stars split so finely.:thumbsup:
Nice work and nice colours on the 1st.;)
Cheers Daniel.
jjjnettie
07-02-2011, 10:32 AM
We are so overwhelmed by the overall view of M42, that we don't take the time to take in the finer details. A worthy target on it's own as you've shown us.
Beautiful work Dennis.
Dennis
08-02-2011, 09:57 PM
Thanks Mike, Marc, Mike, Daniel and Jeanette, I appreciate your comments. I really enjoyed my re-acquaintance with the night skies after a lengthy absence, mainly due to poor weather and liking my bed too much!:)
Cheers
Dennis
atalas
08-02-2011, 11:18 PM
what nice resolution.....such short exposure too.
Hagar
11-02-2011, 08:51 AM
Nice core area there Dennis, The colours have me questioning some of my older images but it's nice and clean and sharp.
Well done.
ballaratdragons
16-02-2011, 11:22 PM
Dennis,
WOW is all I can say!
I spent my early years of imaging on the trap trying to pull out G and H1&2.
You have surpassed all my previous efforts by also pulling out I.
Well done!
Link to your fantastic image: http://www.iceinspace.com.au/forum/attachment.php?attachmentid=89096
gregbradley
17-02-2011, 04:05 PM
Longer exposure is not always better.
Great resolution.
Greg.
John Hothersall
17-02-2011, 06:00 PM
Lovely colour, I could not get that green with my Mintron video camera, great trap separation.
John.
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