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Erik Bakker
Carpal Tunnel
*****

Reged: 08/10/06

Loc: The Netherlands, Europe
Re: Comet C/2011 L4 (PANSTARRS) new [Re: hiro]
      #5806124 - 04/18/13 06:16 AM

Hiro, that is a very impressive image of the comet.

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Tonk
Postmaster
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Erik Bakker]
      #5806176 - 04/18/13 07:41 AM

Hiro - am a fan of your fan Thats a nice deep image

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hiro
Pooh-Bah


Reged: 07/17/07

Loc: Tokyo
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Tonk]
      #5806202 - 04/18/13 08:05 AM

Thanks Erik and Tonk for the encouragement of my maddness.

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Rich (RLTYS)Moderator
Post Laureate
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Reged: 12/18/04

Loc: New York (Long Island)
Re: Comet C/2011 L4 (PANSTARRS) new [Re: hiro]
      #5808240 - 04/19/13 07:34 AM

To All

Well, I finally got my chance to visually observe C/2011 L4 Panstarrs for the first time this morning, 4-18-13, with my 10” refl. Observed from 4:15 to 5:00 AM when morning twilight began to interfere. Despite light pollution and nearby street lights and with Panstarrs being rather low in the northeast this is what I observed.

At 76x I was able to quickly detect Panstarrs fairly bright coma as a roundish ball of haze with a bright pseudo nucleus that was star like in appearance. I estimated the coma condensation (CC) at 7. At 174x I had a better view of the coma which had somewhat diffused edges.

Panstarrs tail was much more difficult to observe, seemingly only visible with averted vision and “tapping” the scope. The tail appears rather straight and heading in a northerly direction. There seemed to be a slight widening of the tail as it extended from the much brighter coma. I glimpsed a somewhat definite edge on the western side of the tail with the eastern side seemingly more diffused. Most of these observations were made at 174x but the tail was barely observed even at 76x. I did notice that as Panstarrs rose higher in the sky the tail became slightly easier to see and I could observe it with direct vision but it was still extremely faint. I estimated the length of the tail at about 13 arc minutes but I know I was only seeing the brighter western side of Panstarrs tail as the tail is quite wide and diffused.

No color or movement was noted while observing this comet. I’d hoped Panstarrs would have been brighter then it was. This comet needs a darker sky to properly observe it.

Rich (RLTYS)


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Wes Stone
member


Reged: 05/20/03

Loc: Chiloquin, OR
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Rich (RLTYS)]
      #5809386 - 04/19/13 07:37 PM

The comet is in Cassiopeia now. It is circumpolar from Oregon, but is higher in the predawn sky. I got a good look at it under dark skies (but subpar transparency with a bit of high haze) on the morning of April 17th just before morning twilight.

The comet was still an impressive naked-eye object, appearing as a diffuse streak about 1 degree long. I'd roughly estimate the integrated magnitude (coma + tail) as about 4.5. The m1 magnitude of the coma alone would be much fainter, but there is not a clear delineation between the coma and tail. Binoculars revealed more detail, but didn't extend the tail length.

The comet was a nice sight in my 10" Dob at low power, sitting in an impossibly rich star field. A 10th-magnitude star was just south of the coma, and over the 30 minutes or so that I observed the comet it moved northward away from this star. The coma diameter was about 4', with a bright almost-stellar pseudonucleus. The coma and the brightest part of the tail were yellowish. Two tail components were visible--a bright, narrow wedge in PA 350 degrees that extended over a degree while fading gradually; and an antitail that emerged in a sharp spike about 20' long in PA 115 degrees. A faint, fan-shaped glow was visible in the angle between the antitail and the main tail.

Here's a sketch: http://skytour.homestead.com/files/c11L4130417-PSE.jpg

Wes Stone
Chiloquin, OR
http://skytour.homestead.com


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Dave Mitsky
Postmaster
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Reged: 04/08/02

Loc: PA, USA, Planet Earth
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Wes Stone]
      #5809691 - 04/19/13 09:57 PM Attachment (20 downloads)

I had completely forgotten that I took a few pictures of Comet PanSTARRS with my iPod Touch on the evening of March 13th. One of them actually turned out to be reasonably good after a little processing.

Dave Mitsky


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yashi
super member


Reged: 11/15/11

Re: Comet C/2011 L4 (PANSTARRS) new [Re: Dave Mitsky]
      #5811349 - 04/20/13 04:27 PM

i finally managed to see it. The brightness predictions are so wrong in reality, i didnt expect that. I was looking for an object with around 5-6mag, in reality it was more like 10mag T_T. At least the 8-9mag stars in the area were much brighter.

I could barely see it in my 6" scope.


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RolandosCY
super member


Reged: 01/02/09

Loc: Nicosia, Cyprus
Re: Comet C/2011 L4 (PANSTARRS) new [Re: yashi]
      #5811815 - 04/20/13 09:16 PM

Not visible at 4am with 15x70 binoculars from within the city (Nicosia, Cyprus), despite good transparency and the comet being located in a very easy to locate spot in Cassiopeia... Well, here it goes.... See ya in a few dozen thousand years PanSTARRS!!!!!

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Mike B.
Carpal Tunnel
*****

Reged: 10/24/05

Loc: Louisiana
Re: Comet C/2011 L4 (PANSTARRS) new [Re: RolandosCY]
      #5816161 - 04/22/13 07:18 PM

I stayed out all night Friday, April 19, 2013 and imaged Comet Panstarrs early morning on Saturday, Apr 20th. Transparency was poor and the LP was almost overwhelming. I couldn't find it in the 10x50 binoculars - too much LP, I guess. I had my TV-85 and Atlas EQ-G tuned in on it, however and managed to get 70x1 minute sub-images. Here's how they came out in processing:



I did a star-freeze process on it, too:



It will probably be two weeks before I can get out again and image the comet. By that time, it will be quite dim compared to how it was in March and early April. Oh, well... it was fun while it lasted.


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hiro
Pooh-Bah


Reged: 07/17/07

Loc: Tokyo
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Mike B.]
      #5819275 - 04/24/13 08:09 AM

Here is a frame of the comet among the gems in Cassiopeia April 21, 2013.



The original is here in my flickr page as usual.

http://www.flickr.com/photos/hiroc/8678065340/

Thank you for looking.


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rdandrea
Carpal Tunnel
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Reged: 06/13/10

Loc: Colorado, USA DM59ra
Re: Comet C/2011 L4 (PANSTARRS) new [Re: hiro]
      #5819618 - 04/24/13 12:00 PM

Lovely photo.

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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: Comet C/2011 L4 (PANSTARRS) new [Re: rdandrea]
      #5828368 - 04/28/13 01:26 PM Attachment (26 downloads)

My pic from LP London Friday night

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Rich (RLTYS)Moderator
Post Laureate
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Reged: 12/18/04

Loc: New York (Long Island)
Re: Comet C/2011 L4 (PANSTARRS) new [Re: nytecam]
      #5839715 - 05/04/13 08:37 AM Attachment (28 downloads)

Here's an image of Panstarrs I took this morning (5/4) with the SLOOH T2wf camera.

Rich (RLTYS)


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MessiToM
scholastic sledgehammer
*****

Reged: 12/21/09

Loc: Huntingdon PA
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Rich (RLTYS)]
      #5842117 - 05/05/13 05:39 PM

I easily found it this morning a 0300 est 5-5-13 It was obvious but not as bright as I thought/hoped. It was wedge like shaped.

This was through my 17.5"


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Tonk
Postmaster
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) new [Re: MessiToM]
      #5844929 - 05/07/13 05:38 AM

I had a late season chance to image the comet last night and early this morning - darkness is only around 4 hours here now and dropping fast. What popped up was the plentary nebula NGC 40 (Caldwell 2) was right in there with the comet! A rather fancy pairing!


This was my last imaging chance for a while as 54N is not blessed with dark night skies from mid May and so we get all night twilight very soon. I don't have time to process this image for a while either as exams start very soon. I'll post up a link in late June.


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John Wunderlin
Vendor - Spike-a Focusing Mask
*****

Reged: 10/01/04

Loc: Mineral Point, Wi
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Tonk]
      #5850235 - 05/09/13 03:07 PM Attachment (16 downloads)

The comet has finally moved past my Western obstructions. This is about an hour of LRGB data from Tuesday night May 7. Not a lot of color that I could bring out on the comet.

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John Wunderlin
Vendor - Spike-a Focusing Mask
*****

Reged: 10/01/04

Loc: Mineral Point, Wi
Re: Comet C/2011 L4 (PANSTARRS) new [Re: John Wunderlin]
      #5850238 - 05/09/13 03:08 PM

BTW the light streak from upper left to lower right is a streetlight nebula.

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Tonk
Postmaster
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Reged: 08/19/04

Loc: Leeds, UK, 54N
Re: Comet C/2011 L4 (PANSTARRS) new [Re: John Wunderlin]
      #5850259 - 05/09/13 03:15 PM

Quote:

Not a lot of color that I could bring out on the comet.




This is such a dusty comet that all you are getting is refelected white sunlight. I get no colour as well.


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Mike C
scholastic sledgehammer


Reged: 03/05/08

Loc: Cornwall, UK
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Tonk]
      #5850634 - 05/09/13 06:45 PM Attachment (23 downloads)

I got a chance to view and image a late PanSTARRS too, on the evening of 8 May. It's clearly now faint visually, but still an attractive imaging target.

Here's the result of 8 x 5-minute manually-guided exposures at ISO 1600 with a modded EOS 600D and Celestron C8 with focal reducer. Registration and stacking was via DeepSkyStacker.

Regards,


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operascope
sage
*****

Reged: 09/03/08

Loc: Canada
Re: Comet C/2011 L4 (PANSTARRS) new [Re: Mike C]
      #5855999 - 05/12/13 05:52 PM

I finally got to observe Panstarrs from a dark sky site and was very pleasantly surprised. I keep reading post that say that it is "visually faint", and while it is certainly fainter than what it was, it is a very easy catch and very rewarding through my 12" f/5 dob. Both tails were very much present, and it filled up my 35 Panoptic. To me it is the most rewarding telescopic object in the sky right now!
When I pointed it out to the other people at the star party, they were also quite surprised at the view. This comet still has life, and not just for astrophotographers!


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