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  #61  
Old 17-12-2014, 07:22 PM
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cometcatcher (Kevin)
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Yeah I haven't seen any pics with a dust tail. The complete opposite to 2013 A1 Siding Spring. It was all dust and no ion tail.
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  #62  
Old 17-12-2014, 08:05 PM
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Finder chart for tonight, 17th Dec.
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  #63  
Old 17-12-2014, 08:07 PM
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Finder chart for Christmas night.
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  #64  
Old 18-12-2014, 06:01 AM
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nebulosity. (Jo)
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Here is my try from last night. Not real good but I'm happy as it is the first comet I have ever imaged with a scope.

60x1 minute subs. 8" F5 scope, cooled 350d.

Also a wide field image from the night before.

58x4 minute subs (around 4 hours) with 85mm lens and cooled 350d.

Cheers
Jo
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  #65  
Old 18-12-2014, 08:53 AM
algwat (Alan)
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good enough to see the slight blue ion tail.
well done, jo.

regards, alan
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  #66  
Old 18-12-2014, 02:08 PM
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Nice ones Jo. Congratulations on your first comet pics!
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  #67  
Old 18-12-2014, 09:50 PM
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One straight out of the camera tonight (18/12/14)

Normal Luminance and Inverted and stretched to show the tail better.

Cheers
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  #68  
Old 18-12-2014, 10:24 PM
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Is the tail really as long as SkySafari is leading me to believe? Photographically not visually.
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  #69  
Old 19-12-2014, 07:21 AM
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Than you Alan and Kevin!

Dunk, judging from another fairly deep wide field I did, I'd estimate the tail to be about 3 degrees long. Maybe a tad more.

Jo
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  #70  
Old 19-12-2014, 09:05 AM
algwat (Alan)
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hey, john good work again.

How many of those can you make across a good session?
one every 5 - 15mins would make an interesting animation.
Perhaps to catch dynamic actions in the ion tail. need about 20 frames..

kind regards, Alan.
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  #71  
Old 19-12-2014, 09:19 AM
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Quote:
Originally Posted by nebulosity. View Post
judging from another fairly deep wide field I did, I'd estimate the tail to be about 3 degrees long. Maybe a tad more.
Great - thanks Jo! Might try to have a go at it if it's clear over the weekend
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  #72  
Old 19-12-2014, 09:31 AM
glend (Glen)
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I am going to give it a go this weekend as well. Any advice on sub lengths on this rapidly moving object. I suppose I need to guide on the comet itself?
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  #73  
Old 19-12-2014, 10:18 AM
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Thanks Alan I can notice movement after each exposure ATM as the Comet is moving quite quickly.

Glen, the exposure above is a single 300 second shot with an 8300 CCD, a 102mm refractor working at 610mm, if you blow it up you can see slight elongation in the core. I have another set of 5 X 50 second exposures I have yet to process so I will see how that pans out. The above shot was taken mainly to Invert and get some detail of the tail. I tracked on the stars, if you use PHD2 I believe you can track on the Comet itself. Hope that helps a little.

Cheers
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  #74  
Old 19-12-2014, 02:13 PM
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Nice ones John! Really clear tail detail.
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  #75  
Old 19-12-2014, 03:00 PM
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Comet Lovejoy imaged from Sydney last night

The latest Comet Lovejoy imaged from the outer suburbs of Sydney last night, 18-19 December 2014. The best sub-frames were recorded after midnight when many people had switched off their LED Christmas lights and other floodlights. The first image is a simple average of 30 x 3 minute sub-frames recorded starting at midnight. Sigma clipping was used for the second image. The second image was over-stretched to emphasise very faint tails. Notice the very broad and exceedingly faint tail almost horizontal in the image. I count at least 6 different tails. Not bad considering how bright the sky was in Sydney last night.

Higher resolution versions:

https://www.flickr.com/photos/mlpark...n/photostream/


Technical details: Televue NP127is at f/5.2, QSI683wsg camera with Astronomik Luminance filter, 3 minute sub-frames, 30 for the “average” image and 63 for the “sigma clipping” image.
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  #76  
Old 19-12-2014, 05:00 PM
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Holy cow! Look at that tail!
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  #77  
Old 19-12-2014, 06:59 PM
algwat (Alan)
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Good images Murray,

you have 3 minute subs, if you can make one look like John's image, then try to make an animation of all your images. No need to align them. But you may need to logscale or stretch the images to see the tail a bit better.

I would be interested to see if the result shows tail dynamics

Doesn't matter if it does not look perfect....
kind regards, Alan
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  #78  
Old 20-12-2014, 11:51 PM
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The tail is quite different every night. A very dynamic object indeed.
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  #79  
Old 21-12-2014, 06:29 AM
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Quote:
Originally Posted by cometcatcher View Post
The tail is quite different every night. A very dynamic object indeed.
I saw it for the first time Friday night and i will certainly be watching this one closely. What is the current magnitude estimate & how bright is it expected to get ?
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  #80  
Old 21-12-2014, 06:41 AM
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Quote:
Originally Posted by gaa_ian View Post
I saw it for the first time Friday night and i will certainly be watching this one closely. What is the current magnitude estimate & how bright is it expected to get ?
Here's a nice little website on the comet.
http://theskylive.com/c2014q2-info
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