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Tonk
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: C/2012 S1 ISON new [Re: canukLX90]
      #6120446 - 10/06/13 11:36 AM

Quote:

The last issue of Astronomy magazine I have is from January of 2013 (renewed subscription last week, mostly because of this comet),




Which I suspect is precisly what they wanted to achieve.

There is usually no chance a prediction made 11 months before perihelion with a new first time visiting comet has any chance of having any accuracy. A good journalist would know this by doing the required research and looking at the success of historial long term predictions (Kohoutec anyone?) and not blithly following the initial hype that was thrown up only days after this comet was discovered.

Hence the backtracking after the comet has been observed over a much large portion of its orbit and its dynamic behaviour better understood.

At the time we were told it could be as bright as the moon without qualifying that this would be very brief (a few hours only) and very very close to the sun in the daytime sky

Quote:

I don't want to go to all that trouble if my chances of seeing it are very low.




Factor in that it currently is around mag 11 but brightening every day


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Parkit
super member


Reged: 08/08/08

Re: C/2012 S1 ISON new [Re: Tonk]
      #6120467 - 10/06/13 11:50 AM

Thanks for the replies, I figured that the early hype was exactly that. I'll wait a bit before I start looking for it in the 14" dob.

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kfiscus
Carpal Tunnel
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Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: C/2012 S1 ISON [Re: Parkit]
      #6120980 - 10/06/13 05:14 PM

Found it easily on Oct.2 in my Z12. Looked like a slightly oval planetary nebula, both in terms of color and fuzziness. I couldn't pick up the tail, my observing buddy thought he got a glimpse of it. We've been cloudy ever since.

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Tonk
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: C/2012 S1 ISON new [Re: kfiscus]
      #6121729 - 10/07/13 04:49 AM

Quote:

I'll wait a bit before I start looking for it in the 14" dob




I would have thought a 14" would master a 11 mag object! However ISON is currently in the zodiacal light band which doesn't help


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hiro
Pooh-Bah


Reged: 07/17/07

Loc: Tokyo
Re: C/2012 S1 ISON new [Re: Tonk]
      #6122091 - 10/07/13 10:37 AM

Hi again,

I could take new frames of the comet on October 5, 2013. It was in zodiacal light.



Data and original are here as usual.
http://www.flickr.com/photos/hiroc/10131796815/



Data and original are here.
http://www.flickr.com/photos/hiroc/10132557786

The comet looked still dark and small, thought it got activated much.

Thank you for looking.


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Dave M
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Reged: 08/03/04

Loc: Ohio
Re: C/2012 S1 ISON new [Re: hiro]
      #6125959 - 10/08/13 10:08 PM

Nice shots Hiro..

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MessiToM
scholastic sledgehammer
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Reged: 12/21/09

Loc: Huntingdon PA
Re: C/2012 S1 ISON new [Re: hiro]
      #6125963 - 10/08/13 10:10 PM

Another nice photo ^

I have been either cloud or fog plagued for a week or two. I will wake up AGAIN at 5am to check for a clear low horizon.


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Mike B.
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Reged: 10/24/05

Loc: Louisiana
Re: C/2012 S1 ISON new [Re: MessiToM]
      #6126065 - 10/08/13 11:05 PM

Here's my first go at it:


Comet ISON, 2013-10-07. 24x120 sec @ ISO 800, TV-85 at F/5.6, IDAS-LPS, Canon T3 mod.

Even though I'm shooting through lots of bad LP and I had to cut a tree down to get the shot, ISON is doing well enough to produce a decent image even under those conditions.

Edited by Mike B. (10/09/13 10:28 AM)


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dyslexic nam
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Reged: 01/28/08

Loc: PEI, Canada
Re: C/2012 S1 ISON new [Re: Mike B.]
      #6126080 - 10/08/13 11:14 PM

^^^ very nice pic.

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MessiToM
scholastic sledgehammer
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Reged: 12/21/09

Loc: Huntingdon PA
Re: C/2012 S1 ISON new [Re: dyslexic nam]
      #6126204 - 10/09/13 12:38 AM

Cut a tree down for the shot! Lol that's great. Good pic!

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Tonk
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Loc: Leeds, UK, 54N
Re: C/2012 S1 ISON new [Re: MessiToM]
      #6126382 - 10/09/13 05:50 AM

Quote:

Even though I'm shooting through lots of bad LP and I had to cut a tree down to get the shot, ISON is doing well enough to produce a decent image even under those conditions.




Darn, I have to cut out 20 trees (not mine) and dig out a whole hillside and reroute a road. I won't get a photographic look in until post perihelion


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SporQ
member


Reged: 09/03/13

Loc: Indiana, USA
Re: C/2012 S1 ISON new [Re: Tonk]
      #6126606 - 10/09/13 09:30 AM

Cutting down trees just allows more LP in.

What magnification is the above photo? (This really should have been included. If a photo is worth posting, it deserves a caption).


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blb
Post Laureate


Reged: 11/25/05

Loc: Piedmont NC
Re: C/2012 S1 ISON new [Re: SporQ]
      #6126630 - 10/09/13 09:46 AM

Quote:

What magnification is the above photo? (This really should have been included. If a photo is worth posting, it deserves a caption).



Wow! Here is the caption he provided.

Quote:

Comet ISON, 2013-10-07. 24x120 sec @ ISO 800, TV-85 at F/5/6, IDAS-LPS, Canon T3 mod.




All that needed to be included is included in it. I have never seen the magnification posted with any picture in a magazine or book. In fact he gives more information than most published photos.


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John Wunderlin
Vendor - Spike-a Focusing Mask
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Loc: Mineral Point, Wi
Re: C/2012 S1 ISON new [Re: SporQ]
      #6126754 - 10/09/13 10:57 AM

Quote:

Cutting down trees just allows more LP in.




And also allows you to image an object that you otherwise couldn't image. I'd do the same, but my problem tree is in my neighbor's yard- they may say something if I cut down their tree.


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brianb11213
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Reged: 02/25/09

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Re: C/2012 S1 ISON new [Re: John Wunderlin]
      #6126807 - 10/09/13 11:28 AM

Quote:

my problem tree is in my neighbor's yard- they may say something if I cut down their tree.



Build an observing tower?


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skyward_eyes
Vendor - Sky-Watcher USA
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Reged: 12/12/06

Loc: California
Re: C/2012 S1 ISON new [Re: John Wunderlin]
      #6126808 - 10/09/13 11:28 AM

I was finally able to grab ISON this past Sunday morning. using my 16" dob it resembled a faint nebula. I was also able to try the Lumicon Comet filter I bought a couple months ago. Turns out it actually worked! It brought out more of the comet's coma. I need to try getting an image of it now.

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Mike B.
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Reged: 10/24/05

Loc: Louisiana
Re: C/2012 S1 ISON new [Re: Tonk]
      #6126990 - 10/09/13 01:21 PM

Quote:

Quote:

Even though I'm shooting through lots of bad LP and I had to cut a tree down to get the shot, ISON is doing well enough to produce a decent image even under those conditions.




Darn, I have to cut out 20 trees (not mine) and dig out a whole hillside and reroute a road. I won't get a photographic look in until post perihelion




Twenty trees? Gosh! Sorry to hear about your neighbors' trees (and the other stuff) blocking your view to Comet ISON, Tonk.

Luckily, my tree was small and it was not doing much for me as far as LP blocking or shade. A very sharp hand saw took care of the problem in short order.

However, to get a really good look and better imaging data for Comet ISON, I'll have to travel to a dark sky location, it seems. I'm too limited here at home.


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CygnuS
sage


Reged: 07/11/11

Loc: The Great Rift
Re: C/2012 S1 ISON new [Re: Mike B.]
      #6127090 - 10/09/13 02:03 PM

Great image MikeB. Thanks for posting it and thanks for risking life and limb (tree limb that is) to get it.

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Savio Fong
Vendor (Galaxy Scientific)


Reged: 10/05/09

Loc: Hong Kong
Re: C/2012 S1 ISON new [Re: CygnuS]
      #6127798 - 10/09/13 08:15 PM Attachment (21 downloads)

taken from my robotic observatory in Tibet, 4300m altitude. The comet is within 2 degree from Mars.

stack of 15x180s

APM 105/650 APO
FLI Proline 16803 Camera
Paramount ME

33% crop


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Savio Fong
Vendor (Galaxy Scientific)


Reged: 10/05/09

Loc: Hong Kong
Re: C/2012 S1 ISON new [Re: Savio Fong]
      #6127800 - 10/09/13 08:15 PM Attachment (18 downloads)

and this is the 100% crop, the original field is more than 3x3 degree with my current setup.

I found the comet is moving quite fast, with 2.8"/pixel resolution, single frame of 180s exposure already show slight elongation of the nuclear.

Edited by Savio Fong (10/09/13 08:18 PM)


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