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Old 30-12-2011, 07:25 PM
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Phil Hart
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here's a quick process of one of my shots from this morning. i've got my Vixen GP-DX mount on the beach here at Camp Cooinda and been setting up cameras etc in the evening and letting it all run overnight and then picking up cameras again in the morning to see what i got.

pretty cloudy last night but got this shot through a not very convincing gap in the cloud. contrast against darker sky soon will be good if it can just hang in there..

cheers
phil
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  #422  
Old 30-12-2011, 07:40 PM
cstocky (Chris)
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Nice shot Phil. Unfortunately the cloud was solid here this morning.
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  #423  
Old 30-12-2011, 07:43 PM
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jjjnettie (Jeanette)
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Definitely one of the better shots of the comet Phil. But boy o boy it's fading fast.
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  #424  
Old 30-12-2011, 07:45 PM
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kinetic (Steve)
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Set 1 of my two DSLR sets..
Tail extends maybe past the Coal Sack in mine too...maybe.
Great discussion.

Steve
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  #425  
Old 30-12-2011, 07:51 PM
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I can see in Phil's image that the tail past the coalsack is visible, but only just, the naked eye probably won't show this detail though unless the comet moves into a more contrasty sky.
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  #426  
Old 30-12-2011, 10:54 PM
callingrohit (Vivek)
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Following are my final processed shots of the comet taken on 25th and 26th Dec -

http://www.flickr.com/photos/myshutterworld/6599991017/

http://www.flickr.com/photos/myshutterworld/6599986491/

http://www.flickr.com/photos/myshutterworld/6599976547/

http://www.flickr.com/photos/myshutterworld/6599969697/

http://www.flickr.com/photos/myshutterworld/6599959975/

Its been heavily clouded in Brisbane since last 2-3 days so I don't think I will be even able to see it now. Thank god I was in Hervey Bay for Christmas and was able to view this comet with naked eyes.
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  #427  
Old 30-12-2011, 11:07 PM
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renormalised (Carl)
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Nice shots, Vivek
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  #428  
Old 30-12-2011, 11:54 PM
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Thanks Carl.
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  #429  
Old 30-12-2011, 11:58 PM
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Thanks for the info Colin and Phil. I'm shooting more and more in RAW now - I just need to get more proficient in processing them! I'll have a look at the software you suggested. It's something I'd certainly like to do more of.

Thank you Liz for including me in that list of great photographers! And i agree, many fantastic images of the comet.
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  #430  
Old 31-12-2011, 01:27 AM
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Here's another shot from last night's shoot (and final??). I had a nice Iridium flare (presumably) pass through the middle of the image too! This is a stack of 2 images because the flare path was spread over both - indicating it probably had a long transit time therefore wouldn't have been a comet since the images are 30 sec each with 3 secs in between them for the camera to write them to the disk etc. These were part of a 2 hour series I took for a timelapse but I've also stacked them into a startrail image.

The is at West Beach, Robe, SA. The lights on the landscape is due to the lighthouse almost directly behind me! Although I had misgivings when I turned up to start imaging but I think it adds to the effect.
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Old 31-12-2011, 01:40 AM
callingrohit (Vivek)
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fantastic images Wayne esp the startrail.

Last edited by callingrohit; 31-12-2011 at 01:40 AM. Reason: typo
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  #432  
Old 31-12-2011, 06:12 AM
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mozzie (Peter)
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gezzz there,s some nice photo's being taken......

i put a sketch in the visual section of the comet done on the 28th dec. here it is of a different perspective seen through my eyes..
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  #433  
Old 31-12-2011, 07:17 AM
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here are shots from this morning. 4 minutes with 50mm lens @f3.2 ISO400 and 30 secs with 24mm lens @f1.8 and ISO1600.

cheers
Phil
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  #434  
Old 31-12-2011, 07:46 AM
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Thanks Phil. Looks like the comet is running out of puff and the tail is faint above alpha Centauri.
When the comet gets away from the Milky Way it will be easier to measure the tail.
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  #435  
Old 31-12-2011, 09:24 AM
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renormalised (Carl)
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Nice shots Phil

Yeah, I agree with Glen. We're going to have to make as much of whatever clear skies we get from now on because I don't think this comet will last too much longer. Probably a week or so.
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Old 31-12-2011, 09:56 AM
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31 Dec 2011

I'm excited....this morning was the first time
the head would appear above the house from the FOV of the
QHY-8 setup before twilight started......that is still to process!!!

But here is the 3rd set of 3 from the Pentax DSLR.
3rd set is head above the house (from the other side of the yard)
03:23am to 04:15am local

Steve
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  #437  
Old 31-12-2011, 10:24 AM
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Nice shots Steve and Phil,

I attempted to see the comet this morning visually but no joy (bad pun ).

Anyway, it will be interesting to see how long it can be followed photographically.

Terry
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  #438  
Old 31-12-2011, 11:19 AM
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Hi all - deep-imaged the fainter section of tail this morning (well, after midnight) and can't see much evidence of a tail beyond Beta Centauri, amazing the difference a night makes. That would still have put the tail length at 22-degrees. Here's some gif animations:

Emu, 30-31 Dec (29-30 Dec UT), cropped from 18mm shots (3x3min):
http://i727.photobucket.com/albums/w...30Dec11emu.gif

Pointers & below, 30-31 Dec, cropped from 55mm shots (3x3min). The tail gets 'cut off' right near the top of the frame as it crosses a small dark patch. Other shots show very little of substance emerging from the other side.
http://i727.photobucket.com/albums/w...c11low55mm.gif

Beta Centauri (bright star bottom left) to Coal Sack, very little if anything showing:
http://i727.photobucket.com/albums/w...0Dec1155mm.gif

I imaged out as far as Eta Carinae neb and couldn't see anything. I didn't wait to see the head or brighter tail rise but the tail was visible naked eye to maybe a bit beyond Alpha Centauri, averted vision on the last bit.

Cheers -
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  #439  
Old 31-12-2011, 11:30 AM
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Quote:
Originally Posted by glenc View Post
Thanks Phil. Looks like the comet is running out of puff and the tail is faint above alpha Centauri.
When the comet gets away from the Milky Way it will be easier to measure the tail.
Hi Glen - I'm not so sure that's true. I suspect the fade-off has been assisted by the Milky Way although I'd like to hear some expert opinion on it. I've imaged the fainter section of the tail a bit and noticed that whenever it crosses a dark patch in the Milky Way it virtually disappears. Where the Milky Way is very bright it can also wash out the tail but maybe there's a reinforcing thing going on with the tail over the lighter glow. If the tail behaved the same way in dark sky away from the Milky Way as it has been in passing over dark nebulae then maybe the show would have been over days ago. Ah well, time will tell if it can hang on a bit longer!

Cheers -
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  #440  
Old 31-12-2011, 11:33 AM
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kinetic (Steve)
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Rob, Terry, all,

here is the first shot where I was able to get the FOV of the
QHY-8/ SLR lens setup in the observatory on the comet head.

I had a window of about 15 mins, with twilight well and truly underway at
the end of the short set.

edit: added final mosaic of all 4 sets stitched. very distorted due to autostitch probs.


Steve
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Last edited by kinetic; 31-12-2011 at 06:00 PM.
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