Go Back   IceInSpace > General Astronomy > Observational and Visual Astronomy
Register FAQ Calendar Today's Posts Search

Reply
 
Thread Tools Rating: Thread Rating: 26 votes, 4.92 average.
  #501  
Old 26-01-2007, 11:30 PM
dcnicholls's Avatar
dcnicholls
Registered User

dcnicholls is offline
 
Join Date: Sep 2006
Location: Canberra, Oz.
Posts: 129
Splendid images, phobos.

DN
Reply With Quote
  #502  
Old 26-01-2007, 11:34 PM
cometcatcher's Avatar
cometcatcher (Kevin)
<--- Comet Hale-Bopp

cometcatcher is offline
 
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
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.
Attached Thumbnails
Click for full-size image (070126_mcnaught_28mm.jpg)
50.3 KB74 views
Reply With Quote
  #503  
Old 27-01-2007, 12:06 AM
ballaratdragons's Avatar
ballaratdragons (Ken)
The 'DRAGON MAN'

ballaratdragons is offline
 
Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
Quote:
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
Reply With Quote
  #504  
Old 27-01-2007, 12:32 AM
h0ughy's Avatar
h0ughy (David)
Moderator

h0ughy is offline
 
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,231
I hate lights and the moon. it has dimmed immensely since I saw it last. It is heaps further south too.
Attached Thumbnails
Click for full-size image (IMGP3794 (Large).JPG)
23.4 KB56 views
Click for full-size image (cometmcnaught (Large).jpg)
19.9 KB60 views
Reply With Quote
  #505  
Old 27-01-2007, 05:54 AM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,788
Great shots John! The fence shot was definitely a keeper!
Reply With Quote
  #506  
Old 27-01-2007, 09:02 AM
DaveGee's Avatar
DaveGee (Dave Gault)
Occultation Observer

DaveGee is offline
 
Join Date: Aug 2006
Location: Blue Mountains, Australia
Posts: 232
C2006P1 McNaught Nucleus

Imaged 26th Jan
Cheers
Dave
Attached Thumbnails
Click for full-size image (070126_C2006P1.jpg)
134.2 KB84 views
Reply With Quote
  #507  
Old 27-01-2007, 09:09 AM
Ric's Avatar
Ric
Support your local RFS

Ric is offline
 
Join Date: May 2006
Location: Wamboin NSW
Posts: 12,405
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
Reply With Quote
  #508  
Old 27-01-2007, 12:49 PM
loomberah's Avatar
loomberah (Gordon)
Registered User

loomberah is offline
 
Join Date: Jan 2007
Location: Loomberah, NSW
Posts: 87
Quote:
Originally Posted by ballaratdragons View Post
...

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

Actually, he has found 32!
Reply With Quote
  #509  
Old 27-01-2007, 01:00 PM
loomberah's Avatar
loomberah (Gordon)
Registered User

loomberah is offline
 
Join Date: Jan 2007
Location: Loomberah, NSW
Posts: 87
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
Reply With Quote
  #510  
Old 27-01-2007, 01:52 PM
auroradude's Avatar
auroradude
Out... in the cold

auroradude is offline
 
Join Date: Jan 2007
Location: Homer, Alaska USA
Posts: 20
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?
Reply With Quote
  #511  
Old 27-01-2007, 02:04 PM
loomberah's Avatar
loomberah (Gordon)
Registered User

loomberah is offline
 
Join Date: Jan 2007
Location: Loomberah, NSW
Posts: 87
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
Reply With Quote
  #512  
Old 27-01-2007, 03:41 PM
laserphil
Registered User

laserphil is offline
 
Join Date: Jan 2007
Location: Sydney
Posts: 3
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
Reply With Quote
  #513  
Old 27-01-2007, 03:43 PM
[1ponders]'s Avatar
[1ponders] (Paul)
Retired, damn no pension

[1ponders] is offline
 
Join Date: Nov 2004
Location: Obi Obi, Qld
Posts: 18,778
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.
Reply With Quote
  #514  
Old 27-01-2007, 04:13 PM
laserphil
Registered User

laserphil is offline
 
Join Date: Jan 2007
Location: Sydney
Posts: 3
Thanks Paul,
I will have to rescan the images as they are all larger than the limit. All taken on film!

Phil
Reply With Quote
  #515  
Old 27-01-2007, 04:18 PM
iceman's Avatar
iceman (Mike)
Sir Post a Lot!

iceman is offline
 
Join Date: Sep 2004
Location: Gosford, NSW, Australia
Posts: 36,788
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?
Reply With Quote
  #516  
Old 27-01-2007, 04:49 PM
dcnicholls's Avatar
dcnicholls
Registered User

dcnicholls is offline
 
Join Date: Sep 2006
Location: Canberra, Oz.
Posts: 129
Quote:
Originally Posted by iceman View Post

Are they all taken while tracking?
Also, what sort of tracking mount do you use?

DN
Reply With Quote
  #517  
Old 27-01-2007, 06:11 PM
blueskies123_89's Avatar
blueskies123_89 (George)
Registered User

blueskies123_89 is offline
 
Join Date: Jan 2007
Location: Melbourne
Posts: 89
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/
Reply With Quote
  #518  
Old 27-01-2007, 07:13 PM
JohnH's Avatar
JohnH
Member # 159

JohnH is offline
 
Join Date: Feb 2005
Location: NSW
Posts: 1,226
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....
Attached Thumbnails
Click for full-size image (SmallMcNaught2006.jpg)
147.7 KB57 views
Click for full-size image (McNaughtNarooma21012997.jpg)
137.7 KB26 views

Last edited by JohnH; 31-01-2007 at 02:14 PM. Reason: Added new image....
Reply With Quote
  #519  
Old 27-01-2007, 07:24 PM
ballaratdragons's Avatar
ballaratdragons (Ken)
The 'DRAGON MAN'

ballaratdragons is offline
 
Join Date: Jan 2005
Location: In the Dark at Snake Valley, Victoria
Posts: 14,412
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
Reply With Quote
  #520  
Old 27-01-2007, 07:47 PM
loomberah's Avatar
loomberah (Gordon)
Registered User

loomberah is offline
 
Join Date: Jan 2007
Location: Loomberah, NSW
Posts: 87
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 10:08 PM.
Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 09:47 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement