#501  
Old 27-01-2007, 12:30 AM
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dcnicholls
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Splendid images, phobos.

DN
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  #502  
Old 27-01-2007, 12:34 AM
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cometcatcher (Kevin)
<--- Comet Hale-Bopp

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Some of you fellas have mighty dark skies. The comet was barely visible in 7x50 binocs tonight.

A mate of mine, Andru, took this photo before the storm clouds rolled in.

Mintron video camera, 28mm lens 64X frame integration.
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  #503  
Old 27-01-2007, 01:06 AM
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ballaratdragons (Ken)
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Originally Posted by mojo View Post
The comet is dimmer but I'm still impressed by it. This is my only good shot from last night. I wish I could have done the view justice but I've discovered that as a photographer, I make a much better software developer
Geez Terry! That is so 'Australian'!!!!!

Put it on a post card or a promotion for Oz!
Fantastic mate
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  #504  
Old 27-01-2007, 01:32 AM
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h0ughy (David)
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I hate lights and the moon. it has dimmed immensely since I saw it last. It is heaps further south too.
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  #505  
Old 27-01-2007, 06:54 AM
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iceman (Mike)
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Great shots John! The fence shot was definitely a keeper!
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  #506  
Old 27-01-2007, 10:02 AM
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DaveGee (Dave Gault)
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C2006P1 McNaught Nucleus

Imaged 26th Jan
Cheers
Dave
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  #507  
Old 27-01-2007, 10:09 AM
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Hi Dave, great looking images of the nucleus.
I must get some like that as well once the Moon rises a bit later in the night.

Cheers
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  #508  
Old 27-01-2007, 01:49 PM
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loomberah (Gordon)
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Quote:
Originally Posted by ballaratdragons View Post
...

This one (he has discovered 10 comets) will make his name famous!

Actually, he has found 32!
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  #509  
Old 27-01-2007, 02:00 PM
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loomberah (Gordon)
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The ion (or possibly a neutral sodium, given its colour) tail has been visible since the 20th- I posted it on my web page here: http://members.ozemail.com.au/~loomberah/mcnaught.htm

It is reasonably obvious, even in twilight.

The comet is also visible to the naked eye in the mornings, I posted a pic of that yesterday, same URL as above.

cheers, Gordon
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  #510  
Old 27-01-2007, 02:52 PM
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tail split

More nice images lads! The fence one is a keeper. Nice composition - and I say that as a photographer. Worth crawling around with the snakes!

It just occurred to me - I wonder if the "split" tail look that is so prevelent in many images, especially the ones of the nucleus, is actually caused by the shadow of the inner (and denser) coma falling on the tail?
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  #511  
Old 27-01-2007, 03:04 PM
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Quote:
Originally Posted by auroradude View Post
...
It just occurred to me - I wonder if the "split" tail look that is so prevelent in many images, especially the ones of the nucleus, is actually caused by the shadow of the inner (and denser) coma falling on the tail?


Rob McNaught and I looked at this on my image of 18th Jan and some other images, it is definitely not a shadow, because it is curved! At the time the angle subtended by the sun from the comet was about 3 degrees, meaning that any shadow's cone would only be about 20 times as long as the diameter of the nucleus (plus dense nearby coma). The dark line clearly extends much further than this. I think we are just looking through an expanding cone of material and it appears darker where we see the least amount of dust (therefore least reflected sunlight).

cheers, Gordon
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  #512  
Old 27-01-2007, 04:41 PM
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Hi All,

I have just joined this site. How does one post images as I have a few of comet McNaught that may be of interest?

Laserphil
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  #513  
Old 27-01-2007, 04:43 PM
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[1ponders] (Paul)
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Laserphil.

If you click on the "Go Advanced" link at the bottom of the thread and then select "Manage Attachements" halfway down the page. Jpeg uploads are limited to 150Kb.
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  #514  
Old 27-01-2007, 05:13 PM
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Thanks Paul,
I will have to rescan the images as they are all larger than the limit. All taken on film!

Phil
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  #515  
Old 27-01-2007, 05:18 PM
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Just use an image resizing program like "irfanview" and save them under 150k jpeg. Make sure you resize them to around 800px wide to keep the filesize down without compressing too much.

Gordon, nice to see you on IIS! Your images are amazing!

Are they all taken while tracking?
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  #516  
Old 27-01-2007, 05:49 PM
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Quote:
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Are they all taken while tracking?
Also, what sort of tracking mount do you use?

DN
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  #517  
Old 27-01-2007, 07:11 PM
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blueskies123_89 (George)
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Hi all, it seems as if Melbourne is going to be clouded out again for a couple of days. I have put, side by side, a images that i have taken over 4 days. The exposure settings are different, so different the amount of tail visible isn't an indication of the fading of the comet, but you can still see the angle changing.

http://www.flickr.com/photos/georgieland/370373639/

and some other photos
http://www.flickr.com/photos/georgieland/370373523/

http://www.flickr.com/photos/georgieland/367954423/
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  #518  
Old 27-01-2007, 08:13 PM
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Comet Images from Holidays

Hi all,

No fancy gear with me - static tripod only and the 20D. Comet visable one night only (21/1) - but with the crescent moon and venus it was a great sight over Mt Dromadary at Narooma...more to come... have only processed the close up so far....
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Last edited by JohnH; 31-01-2007 at 03:14 PM. Reason: Added new image....
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  #519  
Old 27-01-2007, 08:24 PM
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ballaratdragons (Ken)
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Quote:
Originally Posted by loomberah View Post
Actually, he has found 32!
Thanks Gordon.
I found the '10' information on a website when trolling around. It must be an old site that hasn't been updated.

32!!!! Fantastic. But now Robs name will be spoken among the great: 'Halley', 'West' etc.

I imagine even Rob is blown away with his Comet
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  #520  
Old 27-01-2007, 08:47 PM
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loomberah (Gordon)
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Quote:
Originally Posted by iceman
...Gordon, nice to see you on IIS! Your images are amazing!
Are they all taken while tracking?
Thanks and yes all tracked, but not guided. (Edit: apart from the untracked 15 sec morning photo, camera on mount but motor not running.)

Quote:
Originally Posted by dcnicholls View Post
Also, what sort of tracking mount do you use?
DN
The images from the 18th and 19th are taken from home, using my home made 25cm Newtonian for tracking (theres a pic of that on my home page). Then work interfered and I had to bring my portable but quite old Polaris style mount, and have used that at SSO and from near Dubbo.


cheers, Gordon

Last edited by loomberah; 27-01-2007 at 11:08 PM.
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